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A006958 Number of staircase polyominoes with n cells.
(Formerly M1175)
+0
1
1, 2, 4, 9, 20, 46, 105, 242, 557, 1285, 2964, 6842, 15793, 36463, 84187, 194388, 448847, 1036426, 2393208, 5526198, 12760671, 29466050, 68041019, 157115917, 362802072, 837759792, 1934502740, 4467033943, 10314998977, 23818760154 (list; graph; listen)
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Last modified December 3 22:15 EST 2009. Contains 170310 sequences.


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