id:A011950 - OEIS Search Results

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A011950

Number of Barlow packings with group P3(bar)m1(SO) that repeat after 2n-1 layers.

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1, 3, 3, 11, 21, 39, 85, 171, 333, 683, 1364, 2715, 5461, 10923, 21813, 43687, 87381, 174699, 349525, 699051, 1397970, 2796203, 5592402 (list; graph; listen)

	OFFSET	`3,2`
	REFERENCES	`T. J. McLarnan, The numbers of polytypes ..., Zeits. Krist. 155, 269-291 (1981).`
	CROSSREFS	`Sequence in context: A027416 A163932 A007022 this_sequence A124265 A163938 A109937` `Adjacent sequences: A011947 A011948 A011949 this_sequence A011951 A011952 A011953`
	KEYWORD	`nonn,easy`
	AUTHOR	`N. J. A. Sloane (njas(AT)research.att.com).`

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Last modified December 15 00:47 EST 2009. Contains 170825 sequences.

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