id:A134660 - OEIS Search Results

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Number of odd coefficients in (1+x+x^2+x^3)^n.

+0
1

1, 4, 4, 4, 4, 16, 4, 8, 4, 16, 16, 4, 4, 16, 8, 16, 4, 16, 16, 16, 16, 64, 4, 8, 4, 16, 16, 8, 8, 32, 16, 32, 4, 16, 16, 16, 16, 64, 16, 32, 16, 64, 64, 4, 4, 16, 8, 16, 4, 16, 16, 16, 16, 64, 8, 16, 8, 32, 32, 16, 16, 64, 32, 64, 4, 16, 16, 16, 16, 64, 16, 32, 16, 64, 64, 16, 16, 64 (list; graph; listen)

	OFFSET	`0,2`
	COMMENT	`a(n) = 2^A036555(n)`
	LINKS	`S. Finch, P. Sebah and Z.-Q. Bai, Odd Entries in Pascal's Trinomial Triangle (arXiv:0802.2654)`
	MATHEMATICA	`PolynomialMod[(1+x+x^2+x^3)^n, 2] /. x->1`
	CROSSREFS	`Cf. A000120, A001316, A008287, A036555, A071053.` `Adjacent sequences: A134657 A134658 A134659 this_sequence A134661 A134662 A134663` `Sequence in context: A035621 A046109 A107680 this_sequence A132383 A115639 A062732`
	KEYWORD	`nonn`
	AUTHOR	`Steven Finch (Steven.Finch(AT)inria.fr), Jan 25 2008`

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Last modified January 8 02:43 EST 2009. Contains 152824 sequences.

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