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A011961 Number of ferrites M_4Y_n that repeat after 6n+20 layers. +0
1
0, 1, 2, 2, 3, 6, 6, 9, 13, 15, 18, 25, 27, 34, 42, 47, 54, 67, 72, 84 (list; graph; listen)
OFFSET

1,3
REFERENCES

T. J. McLarnan, The numbers of polytypes ..., Zeits. Krist. 155, 269-291 (1981).

CROSSREFS

Sequence in context: A035560 A077012 A078921 this_sequence A091770 A032058 A039866

Adjacent sequences: A011958 A011959 A011960 this_sequence A011962 A011963 A011964

KEYWORD

nonn,easy

AUTHOR

njas

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Last modified August 19 23:53 EDT 2008. Contains 142930 sequences.

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