0,2
M. Keller, Counting Polyforms
M. Vicher, Polyforms
Sequence in context: A037540 A037484 A013566 this_sequence A064546 A067961 A104127
Adjacent sequences: A056766 A056767 A056768 this_sequence A056770 A056771 A056772
uned,nonn
James A. Sellers (sellersj(AT)math.psu.edu), Aug 28 2000
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