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%I #14 Oct 10 2022 04:33:27
%S 0,0,0,0,0,0,1,1,0,1,2,1,2,3,4,4,6,7,12,12,17,18,33,34,51,52,93,100,
%T 154,152,276,300,474,460,846,929,1491,1431,2667,2956
%N Number of n-celled polyominoes without holes, symmetric about diagonal 2.
%H Tomás Oliveira e Silva, <a href="http://sweet.ua.pt/tos/animals.html">Enumeration of polyominoes</a>
%Y Cf. A000104, A056878 (with holes allowed).
%K nonn,more
%O 1,11
%A _N. J. A. Sloane_, Sep 03 2000
%E a(29)-a(40) from _John Mason_, Oct 10 2022
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