1,2
T. J. McLarnan, The numbers of polytypes ..., Zeits. Krist. 155, 269-291 (1981).
Sequence in context: A104723 A079162 A043330 this_sequence A083844 A026554 A099413
Adjacent sequences: A011960 A011961 A011962 this_sequence A011964 A011965 A011966
nonn,easy
N. J. A. Sloane (njas(AT)research.att.com).
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