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A056879 Number of n-celled axially symmetric polyominoes without holes. 0

%I

%S 0,0,0,1,2,6,9,23,37,87,138,313,510,1130,1859,4070,6786,14750,24811,

%T 53715,91096,196769,335815,724470,1243175,2680212,4619999,9957652

%N Number of n-celled axially symmetric polyominoes without holes.

%H Tomás Oliveira e Silva, <a href="http://sweet.ua.pt/tos/animals.html">Enumeration of polyominoes</a>

%Y Cf. A000105, A006746.

%K nonn

%O 1,5

%A _N. J. A. Sloane_, Sep 03 2000

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Last modified May 9 13:42 EDT 2021. Contains 343742 sequences. (Running on oeis4.)