id:A011948 - OEIS Search Results

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Number of Barlow packings with group P63mc that repeat after 2n layers.

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1, 1, 4, 7, 18, 31, 70, 126, 261, 484, 960, 1800, 3514, 6643, 12852, 24457, 47151, 90157, 173740, 333498 (list; graph; listen)

	OFFSET	`6,3`
	REFERENCES	`T. J. McLarnan, The numbers of polytypes ..., Zeits. Krist. 155, 269-291 (1981).`
	CROSSREFS	`Cf. A045668.` `Sequence in context: A080650 A005509 A056318 this_sequence A124400 A077920 A135582` `Adjacent sequences: A011945 A011946 A011947 this_sequence A011949 A011950 A011951`
	KEYWORD	`nonn,easy`
	AUTHOR	`njas`

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Last modified September 6 15:44 EDT 2008. Contains 143483 sequences.