id:A071053 - OEIS Search Results

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Number of 1's in n-th row of triangle in A071036.

+0
8

1, 3, 3, 5, 3, 9, 5, 11, 3, 9, 9, 15, 5, 15, 11, 21, 3, 9, 9, 15, 9, 27, 15, 33, 5, 15, 15, 25, 11, 33, 21, 43, 3, 9, 9, 15, 9, 27, 15, 33, 9, 27, 27, 45, 15, 45, 33, 63, 5, 15, 15, 25, 15, 45, 25, 55, 11, 33, 33, 55, 21, 63, 43, 85, 3, 9, 9, 15, 9, 27, 15, 33, 9, 27, 27 (list; graph; listen)

	OFFSET	`0,2`
	COMMENT	`Number of odd coefficients in (x^2+x+1)^n - Benoit Cloitre (benoit7848c(AT)orange.fr), Sep 05 2003`
	REFERENCES	`S. Wolfram, A New Kind of Science, Wolfram Media, 2002; Chapter 3.`
	LINKS	`T. D. Noe, Table of n, a(n) for n=0..1024` `S. R. Finch, P. Sebah and Z.-Q. Bai, Odd Entries in Pascal's Trinomial Triangle (arXiv:0802.2654)` `T. Sillke, odd trinomials: t(n) = (1+x+x^2)^n` `Index entries for sequences related to cellular automata`
	FORMULA	`[(a(n)-1)/4] mod 2 = A020987(n). - R. Stephan, Mar 18 2004`
	CROSSREFS	`Sequence in context: A015909 A029620 A048691 this_sequence A094439 A122037 A008316` `Adjacent sequences: A071050 A071051 A071052 this_sequence A071054 A071055 A071056`
	KEYWORD	`nonn`
	AUTHOR	`Hans Havermann (pxp(AT)rogers.com), May 26 2002`

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Last modified December 17 23:40 EST 2009. Contains 171025 sequences.

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