id:A014696 - OEIS Search Results

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Poincare series (or Molien series) for mod 2 cohomology of universal W-group W(3).

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1, 3, 14, 30, 77, 138, 273, 438, 748, 1113, 1729, 2436, 3542, 4788, 6630, 8676, 11571, 14751, 19096, 23826, 30107, 36894, 45695, 55146, 67158, 79989, 96019, 113064, 134044, 156264, 183260, 211752, 245973, 281979, 324786, 369702, 422617, 478002 (list; graph; listen)

	OFFSET	`0,2`
	REFERENCES	`A. Adem, Recent developments in the cohomology of finite groups, Notices Amer. Math. Soc., 44 (1997),806-812.`
	LINKS	`Index entries for two-way infinite sequences`
	FORMULA	`G.f.: (1+x+5x^2+x^3+x^4)/((1-x)^2*(1-x^2)^4). a(n)=-a(-6-n).`
	MAPLE	`(x^4+x^3+5*x^2+x+1)/(x-1)^2/(-1+x^2)^4;`
	PROGRAM	`(PARI) a(n)=n+=3; n((18n^4-70n^2+97)-(50n^2-95)*(-1)^n)/3840`
	CROSSREFS	`Sequence in context: A085762 A057870 A031049 this_sequence A071396 A032525 A130697` `Adjacent sequences: A014693 A014694 A014695 this_sequence A014697 A014698 A014699`
	KEYWORD	`nonn`
	AUTHOR	`Alejandro Adem (adem(AT)math.wisc.edu)`

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Last modified November 23 17:09 EST 2009. Contains 167438 sequences.

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