Revision History for A075634
(Underlined text is an addition;
strikethrough text is a deletion.)
Showing all changes.
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#5 by N. J. A. Sloane at Thu Dec 05 19:55:39 EST 2013
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| AUTHOR
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_Amarnath Murthy (amarnath_murthy(AT)yahoo.com), _, Sep 30 2002
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Discussion
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| Thu Dec 05
| 19:55
| OEIS Server: https://oeis.org/edit/global/2075
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#4 by Russ Cox at Fri Mar 30 17:26:46 EDT 2012
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| FORMULA
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a(n) = A075633(n+1) - 1. Also, a(n) = (sqrt(8*(A075631(1) + A075631(2) + ... + A075631(n)) + 1) - 1) / 2. [From _Max Alekseyev (maxale(AT)gmail.com), _, May 08 2009]
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| EXTENSIONS
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One more term from _Max Alekseyev (maxale(AT)gmail.com), _, May 08 2009
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Discussion
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| Fri Mar 30
| 17:26
| OEIS Server: https://oeis.org/edit/global/140
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#3 by N. J. A. Sloane at Tue Jun 01 03:00:00 EDT 2010
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| DATA
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1, 2, 5, 18, 98, 306, 9378, 1726173, 13347339101, 321699559882750173, 4716070968330003553938242926173, 23987291841663781653328392594255840802707701158676395298
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| FORMULA
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a(n) = A075633(n+1) - 1. Also, a(n) = (sqrt(8*(A075631(1) + A075631(2) + ... + A075631(n)) + 1) - 1) / 2. [From Max Alekseyev (maxale(AT)gmail.com), May 08 2009]
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| KEYWORD
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nonn,new
nonn
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| EXTENSIONS
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One more term from Max Alekseyev (maxale(AT)gmail.com), May 08 2009
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#2 by N. J. A. Sloane at Sat Jun 12 03:00:00 EDT 2004
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| DATA
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1, 2, 5, 18, 98, 306, 9378, 1726173, 13347339101, 321699559882750173, 4716070968330003553938242926173
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| KEYWORD
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more,nonn,new
nonn
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| EXTENSIONS
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More terms from Jonathan Cross (jcross(AT)juggler.net), May 08 2004
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#1 by N. J. A. Sloane at Fri May 16 03:00:00 EDT 2003
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| NAME
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Final terms of groups in A075631.
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| DATA
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1, 2, 5, 18
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| OFFSET
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1,2
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| CROSSREFS
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Cf. A075631, A075632, A075633.
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| KEYWORD
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more,nonn
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| AUTHOR
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Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Sep 30 2002
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| STATUS
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approved
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