Search: id:A131467
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%I A131467
%S A131467 1,2,5,12,34,116,449,1897,8469,38959,182511,865612,4140438,19937335,
%T A131467 96519210,469387311,2291623939,11226534301,55165698564,271816734576,
%U A131467 1342610043518
%N A131467 Number of planar polyhexes (A000228) with at most n cells.
%Y A131467 Partial sums of A000228 = number of hexagonal polyominoes (or planar 
               polyhexes) with n cells.
%Y A131467 Sequence in context: A032292 A151408 A121956 this_sequence A000103 A101292 
               A131267
%Y A131467 Adjacent sequences: A131464 A131465 A131466 this_sequence A131468 A131469 
               A131470
%K A131467 nonn
%O A131467 0,2
%A A131467 Tanya Khovanova (tanyakh(AT)yahoo.com), Jul 26 2007

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