Revision History for A154887
(Underlined text is an addition;
strikethrough text is a deletion.)
Showing all changes.
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#5 by Alois P. Heinz at Fri Sep 22 10:26:41 EDT 2023
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#4 by Michel Marcus at Fri Sep 22 09:35:48 EDT 2023
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#3 by Michel Marcus at Fri Sep 22 09:35:43 EDT 2023
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| EXAMPLE
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a(3) = #{3, 8/3+1/3, 5/2+1/2, 7/3+2/3, 2+1, 2+2/3+1/3, 5/3+4/3, 5/3+1+1/3, 3/2+1+1/2, 3/2+2/3+1/2+1/3, 4/3+1+2/3} = 11.. - corrected by _Reinhard Zumkeller_, Feb 02 2009
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| CROSSREFS
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Cf. A154886, A154888, A143270.
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| EXTENSIONS
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Example corrected by Reinhard Zumkeller, Feb 02 2009
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| STATUS
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approved
editing
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#2 by Russ Cox at Fri Mar 30 18:51:00 EDT 2012
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| AUTHOR
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_Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), _, Jan 17 2009
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| EXTENSIONS
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Example corrected by _Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), _, Feb 02 2009
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Discussion
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| Fri Mar 30
| 18:51
| OEIS Server: https://oeis.org/edit/global/246
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#1 by N. J. A. Sloane at Fri Feb 27 03:00:00 EST 2009
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| NAME
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Number of ways to partition n into distinct reduced fractions i/j with j<=n.
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| DATA
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1, 2, 11, 71, 838, 7915, 181443
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| OFFSET
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1,2
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| EXAMPLE
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a(3) = #{3, 8/3+1/3, 5/2+1/2, 7/3+2/3, 2+1, 2+2/3+1/3, 5/3+4/3, 5/3+1+1/3, 3/2+1+1/2, 3/2+2/3+1/2+1/3, 4/3+1+2/3} = 11.
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| CROSSREFS
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A154886, A154888, A143270.
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| KEYWORD
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more,nonn,new
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| AUTHOR
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Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Jan 17 2009
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| EXTENSIONS
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Example corrected by Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Feb 02 2009
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| STATUS
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approved
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