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A089454 Number of n-celled polyominoes with exactly 2 holes. 4

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

%S 0,0,0,0,0,0,0,0,0,0,4,41,346,2384,14560,81863,433172,2192752,

%T 10726252,51094203,238259280,1092053068,4934652298,22034767837,

%U 97407519119,426916828181

%N Number of n-celled polyominoes with exactly 2 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, A089455, A089456, A089457, A089458.

%K hard,nonn

%O 1,11

%A _Joseph Myers_, Nov 04 2003

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Last modified April 27 18:09 EDT 2024. Contains 372020 sequences. (Running on oeis4.)