1,6
T. J. McLarnan, The numbers of polytypes ..., Zeits. Krist. 155, 269-291 (1981).
Sequence in context: A023359 A082482 A066000 this_sequence A019436 A061279 A018073
Adjacent sequences: A011954 A011955 A011956 this_sequence A011958 A011959 A011960
nonn,easy
njas
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