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%I #3 Mar 30 2012 18:36:46
%S 1,2,13,131,1741,28451,549757,12247211,308953453,8706012827,
%T 271093643293,9245857326635,342832527086797,13733511532751099,
%U 591127774090746493,27209560375187822795,1333804962202136755501
%N Column 1 of triangle A107719.
%o (PARI)
%Y Cf. A107717, A107719.
%K nonn
%O 0,2
%A _Paul D. Hanna_, May 30 2005