login
Number of n-celled polyominoes with exactly 4 holes.
4

%I #4 Apr 07 2015 10:48:39

%S 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,8,179,2509,25609,214932,1578984,

%T 10536260,65411645,383981499,2156114468

%N Number of n-celled polyominoes with exactly 4 holes.

%H Tomás Oliveira e Silva, <a href="http://www.ieeta.pt/%7Etos/animals/a44.html">Animal enumerations on the {4,4} Euclidean tiling</a>

%Y Cf. A001419, A057418, A089454, A089455, A089457, A089458.

%K hard,nonn

%O 1,17

%A _Joseph Myers_, Nov 04 2003