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Column 2 of triangle A152798; first differences of A122889.
3

%I #2 Mar 30 2012 18:37:15

%S 1,1,3,6,15,40,113,348,1148,4045,15203,60710,256688,1145887,5386283,

%T 26590338,137537012,743766652,4196681423,24661702224,150676068558,

%U 955611495432,6281965526173,42745748797360,300690981532778

%N Column 2 of triangle A152798; first differences of A122889.

%Y Cf. A152798, A122889.

%K nonn

%O 0,3

%A _Paul D. Hanna_, Dec 23 2008