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Search: id:A011957
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A011957 Number of ZnS polytypes that repeat after n layers. +0
1
0, 1, 1, 1, 1, 2, 3, 6, 10, 18, 31, 59, 105, 198, 365, 688, 1285, 2438, 4599, 8755, 16647, 31806, 60787, 116570, 223696, 430290, 828514, 1598025, 3085465, 5965612, 11545611, 22370304, 43383539, 84216330, 163617801, 318148208 (list; graph; listen)
OFFSET

1,6
REFERENCES

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

CROSSREFS

Sequence in context: A023359 A082482 A066000 this_sequence A019436 A061279 A018073

Adjacent sequences: A011954 A011955 A011956 this_sequence A011958 A011959 A011960

KEYWORD

nonn,easy

AUTHOR

njas

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Last modified July 19 08:04 EDT 2008. Contains 142098 sequences.

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