The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A109091 (Bold, blue-underlined text is an addition; faded, red-underlined text is a ~~deletion~~.)
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A109091

Expansion of (1 - eta(q)^5 / eta(q^5)) / 5 in powers of q.
(history; published version)

#38 by Michel Marcus at Mon Jan 29 01:20:32 EST 2024

STATUS

reviewed

approved

#37 by Joerg Arndt at Mon Jan 29 00:31:30 EST 2024

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proposed

reviewed

#36 by Amiram Eldar at Mon Jan 29 00:27:01 EST 2024

STATUS

editing

proposed

#35 by Amiram Eldar at Mon Jan 29 00:07:16 EST 2024

CROSSREFS

Cf. A284097, A284103, A284150, A284152, A284280, A284281.

#34 by Amiram Eldar at Mon Jan 29 00:04:29 EST 2024

FORMULA

Sum_{k=1..n} abs(a(k)) ~ c * n^2, where c = Pi^2/(15*sqrt(5)) = 0.294254... . - Amiram Eldar, Jan 29 2024

STATUS

approved

editing

#33 by N. J. A. Sloane at Wed May 10 21:31:16 EDT 2017

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proposed

approved

#32 by Ilya Gutkovskiy at Wed May 10 18:20:40 EDT 2017

STATUS

editing

proposed

#31 by Ilya Gutkovskiy at Wed May 10 17:33:03 EDT 2017

FORMULA

L.g.f.: -log(1/(1 + x/(1 + x^2/(1 + x^3/(1 + x^4/(1 + x^5/(1 + ...))))))) = Sum_{n>=1} a(n)*x^n/n. - Ilya Gutkovskiy, May 10 2017

STATUS

approved

editing

#30 by Giovanni Resta at Sat Apr 01 13:37:00 EDT 2017

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reviewed

approved

#29 by Joerg Arndt at Sat Apr 01 11:23:54 EDT 2017

STATUS

proposed

reviewed