A097869 - OEIS

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A097869

G.f.: (1+x^4+x^5+x^9)/((1-x)*(1-x^2)*(1-x^4)^2).

1, 1, 2, 2, 6, 7, 11, 12, 21, 25, 34, 38, 54, 63, 79, 88, 113, 129, 154, 170, 206, 231, 267, 292, 341, 377, 426, 462, 526, 575, 639, 688, 769, 833, 914, 978, 1078, 1159, 1259, 1340, 1461, 1561, 1682, 1782, 1926, 2047, 2191, 2312, 2481, 2625, 2794, 2938, 3134, 3303 (list; graph; refs; listen; history; internal format)

	OFFSET	`0,3`
	COMMENTS	`Molien series for group of order 128 acting on joint weight enumerators of a pair of binary self-dual codes is (1+x^8+x^10+x^18)/((1-x^2)(1-x^4)(1-x^8)^2).`
	LINKS	`F. J. MacWilliams, C. L. Mallows and N. J. A. Sloane, Generalizations of Gleason's theorem on weight enumerators of self-dual codes, IEEE Trans. Inform. Theory, 18 (1972), 794-805; see p. 804, Sect. 5.4.1.` `Index entries for Molien series`
	CROSSREFS	`Cf. A097870.` `Sequence in context: A011145 A177852 A079811 * A060303 A099577 A106168` `Adjacent sequences: A097866 A097867 A097868 * A097870 A097871 A097872`
	KEYWORD	`nonn`
	AUTHOR	`N. J. A. Sloane (njas(AT)research.att.com), Sep 02 2004`

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Last modified February 17 02:08 EST 2012. Contains 205978 sequences.