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A160459 Omit first term of A160458 and divide by 5. 2
2, 13, 66, 286, 1102, 3879, 12688, 39050, 114114, 318863, 856654, 2222688, 5589916, 13668072, 32576016, 75845402, 172830788, 386088741, 846744800, 1825447086, 3872819904, 8094022001, 16679126516, 33916289400, 68106769602, 135148379654, 265177195950 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Seiichi Manyama, Table of n, a(n) for n = 1..1000

Watson, G. N., Ramanujans Vermutung ueber Zerfaellungsanzahlen. J. Reine Angew. Math. (Crelle), 179 (1938), 97-128. See the expression C^2/B^10.

FORMULA

a(n) = 1/5 * A160458(n) = 1/5 * Sum_{k=0..n} A277212(k)*A277212(n-k) = 2 * A277974(n) + 5 * Sum_{k=1..n-1} A277974(k)*A277974(n-k). - Seiichi Manyama, Nov 27 2016

PROG

(PARI) x='x+O('x^66); v=Vec((eta(x^5)/eta(x)^5)^2); vector(#v-1, j, v[j+1]/5) \\ Joerg Arndt, Nov 27 2016~

CROSSREFS

Cf. A160458, A277212, A277974.

Sequence in context: A266633 A037745 A037626 * A037752 A037640 A137967

Adjacent sequences:  A160456 A160457 A160458 * A160460 A160461 A160462

KEYWORD

nonn

AUTHOR

N. J. A. Sloane, Nov 13 2009

STATUS

approved

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Last modified July 14 13:27 EDT 2020. Contains 335729 sequences. (Running on oeis4.)