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A056878
Number of polyominoes with n cells, symmetric about diagonal 2.
+0
12
0, 0, 0, 0, 0, 0, 1, 1, 0, 1, 2, 3, 3, 5, 6, 14, 9, 20, 20, 56, 32, 80, 64, 224, 114, 315, 217, 863
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Maintained by
N. J. A. Sloane
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Last modified November 30 13:13 EST 2009. Contains 167758 sequences.
AT&T Labs Research
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