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%I #7 Apr 07 2015 11:02:23
%S 4,41,272,1516,7688,36726,168528,751742,3284460,14127796,60040812,
%T 252749460,1055898224,4383854044,18107682684,74474755264,305200110920,
%U 1246872556159,5080537687912,20653896398652
%N Number of fixed n-celled polyominoes with 1 hole.
%H Tomás Oliveira e Silva, <a href="http://sweet.ua.pt/tos/animals.html">Enumeration of polyominoes</a>
%K nonn
%O 7,1
%A _N. J. A. Sloane_, Sep 05 2000
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