id:A122268 - OEIS Search Results

Search: id:A122268

Displaying 1-1 of 1 results found.

page 1

Expansion of f(-q)^2*Q(q)^2 in powers of q.

+0
1

1, 478, 60959, 925922, 5764801, 20722082, 54717118, 103864320, 173379838, 194669278, 214358881, 0, -92574720, -799067998, -815502237, -1959423842, -1300569598, -2939811840, 0, -2686875362, 3317297278, 0, 8406236160, 1662767518 (list; graph; listen)

	OFFSET	`0,2`
	COMMENT	`f(-q) (g.f. A010815) and Q(q) (g.f. A004009) are Ramanujan q-series.`
	PROGRAM	`(PARI) {a(n)=local(A); if(n<0, 0, A=xO(x^n); polcoeff( eta(x+A)^2sum(k=1, n, 240sigma(k, 3)x^k, 1+A)^2, n))}`
	CROSSREFS	`Sequence in context: A020375 A031788 A119129 this_sequence A056987 A025025 A108256` `Adjacent sequences: A122265 A122266 A122267 this_sequence A122269 A122270 A122271`
	KEYWORD	`sign`
	AUTHOR	`Michael Somos, Aug 28 2006`

page 1

Search completed in 0.002 seconds

Last modified July 25 07:41 EDT 2008. Contains 142293 sequences.

AT&T Labs Research