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A134662 Number of odd coefficients in (1+x+x^4)^n. +0
1
1, 3, 3, 9, 3, 7, 9, 17, 3, 9, 7, 21, 9, 17, 17, 33, 3, 9, 9, 27, 7, 17, 21, 43, 9, 27, 17, 51, 17, 35, 33, 67, 3, 9, 9, 27, 9, 21, 27, 51, 7, 21, 17, 51, 21, 41, 43, 83, 9, 27, 27, 81, 17, 43, 51, 113, 17, 51, 35, 105, 33, 67, 67, 137, 3, 9, 9, 27, 9, 21, 27, 51, 9, 27, 21, 63, 27, 51 (list; graph; listen)
OFFSET

0,2

LINKS

S. Finch, P. Sebah and Z.-Q. Bai, Odd Entries in Pascal's Trinomial Triangle (arXiv:0802.2654)

MATHEMATICA

PolynomialMod[(1+x+x^4)^n, 2] /. x->1

CROSSREFS

Cf. A071053.

Adjacent sequences: A134659 A134660 A134661 this_sequence A134663 A134664 A134665

Sequence in context: A074724 A109932 A071909 this_sequence A048883 A036553 A068219

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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