A011961 - OEIS

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A011961

Number of ferrites M_4Y_n that repeat after 6n+20 layers.

0, 1, 2, 2, 3, 6, 6, 9, 13, 15, 18, 25, 27, 34, 42, 47, 54, 67, 72, 84 (list; graph; refs; listen; history; internal format)

	OFFSET	`1,3`
	REFERENCES	`T. J. McLarnan, The numbers of polytypes ..., Zeits. Krist. 155, 269-291 (1981).`
	CROSSREFS	`Sequence in context: A035560 A077012 A078921 * A182713 A091770 A032058` `Adjacent sequences: A011958 A011959 A011960 * A011962 A011963 A011964`
	KEYWORD	`nonn,easy`
	AUTHOR	`N. J. A. Sloane (njas(AT)research.att.com).`

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Last modified February 15 12:05 EST 2012. Contains 205782 sequences.