id:A151723 - OEIS Search Results

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Number of ON states after n generations of cellular automaton based on triangles.

+0
4

0, 1, 7, 13, 31, 37, 55, 85, 127, 133, 151, 181, 235, 289, 331, 409, 499, 505, 523, 553, 607, 661, 715, 817, 967, 1069, 1111, 1189, 1327, 1489, 1603, 1789, 1975, 1981, 1999, 2029, 2083, 2137, 2191, 2293, 2443, 2545, 2599, 2701, 2875, 3097, 3295 (list; graph; listen)

	OFFSET	`0,3`
	COMMENT	`Analog of A151725, but here we are working on the triangular lattice where each cell has six neighbors.` `A cell is turned ON if exactly one of its six neighbors is ON. An ON cell remains ON for ever.` `We start with a single ON cell.`
	LINKS	`David Applegate, The movie version`
	CROSSREFS	`Cf. A151724, A151725, A147562.` `Sequence in context: A065764 A073473 A040084 this_sequence A046139 A023243 A087196` `Adjacent sequences: A151720 A151721 A151722 this_sequence A151724 A151725 A151726`
	KEYWORD	`nonn`
	AUTHOR	`David Applegate and N. J. A. Sloane (njas(AT)research.att.com), Jun 13 2009`

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Last modified December 10 00:48 EST 2009. Contains 170565 sequences.

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