The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A004396 (Bold, blue-underlined text is an addition; faded, red-underlined text is a ~~deletion~~.)
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A004396

One even number followed by two odd numbers.
(history; published version)

#136 by Michael De Vlieger at Thu Sep 29 07:41:38 EDT 2022

STATUS

reviewed

approved

#135 by Joerg Arndt at Thu Sep 29 03:35:20 EDT 2022

STATUS

proposed

reviewed

#134 by Michel Marcus at Thu Sep 29 03:34:53 EDT 2022

STATUS

editing

proposed

#133 by Michel Marcus at Thu Sep 29 03:34:49 EDT 2022

COMMENTS

a(A032766(n)) = n. - Reinhard Zumkeller, Oct 30 2009

FORMULA

a(A032766(n)) = n. - Reinhard Zumkeller, Oct 30 2009

STATUS

approved

editing

#132 by Michel Marcus at Thu Sep 29 03:34:26 EDT 2022

STATUS

reviewed

approved

#131 by Joerg Arndt at Thu Sep 29 03:27:01 EDT 2022

STATUS

proposed

reviewed

#130 by Amiram Eldar at Thu Sep 29 03:10:50 EDT 2022

STATUS

editing

proposed

#129 by Amiram Eldar at Thu Sep 29 02:45:07 EDT 2022

FORMULA

Sum_{n>=1} (-1)^(n+1)/a(n) = log(2)/2. - Amiram Eldar, Sep 29 2022

#128 by Amiram Eldar at Thu Sep 29 02:44:54 EDT 2022

LINKS

William A. Stein, <a href="http://wstein.org/Tables/dimskg0n.gp">Dimensions of the spaces S_k(Gamma_0(N))</a>.

Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/IndependenceNumber.html">Independence Number</a>.

50th International Mathematical Olympiad 2009, <a href="https://www.imo-official.org/problems/IMO2009SL.pdf">Problem Shortlist with Solutions</a>.

<a href="/index/O#Olympiads">Index to sequences related to Olympiads</a>.

#127 by Amiram Eldar at Thu Sep 29 02:43:20 EDT 2022

COMMENTS

a(n) = A096777(n+1) - A096777(n) for n > 0. - Reinhard Zumkeller, Jul 09 2004

FORMULA

a(n) = A096777(n+1) - A096777(n) for n > 0. - Reinhard Zumkeller, Jul 09 2004

STATUS

approved

editing