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A174302 Riordan array ((1-x^2c(x)^2)/(1-xc(x)-x^2c(x)^2),xc(x)), c(x) the g.f. of A000108.

%I A174302 #5 Mar 30 2012 18:59:27
%S A174302 1,1,1,2,2,1,6,5,3,1,19,15,9,4,1,63,48,29,14,5,1,215,160,97,49,20,6,1,
%T A174302 749,548,333,173,76,27,7,1,2650,1914,1165,617,284,111,35,8,1,9490,
%U A174302 6785,4135,2221,1056,439,155,44,9,1
%N A174302 Riordan array ((1-x^2c(x)^2)/(1-xc(x)-x^2c(x)^2),xc(x)), c(x) the g.f. of A000108.
%C A174302 First row is essentially A109262.
%e A174302 Triangle begins
%e A174302 1,
%e A174302 1, 1,
%e A174302 2, 2, 1,
%e A174302 6, 5, 3, 1,
%e A174302 19, 15, 9, 4, 1,
%e A174302 63, 48, 29, 14, 5, 1,
%e A174302 215, 160, 97, 49, 20, 6, 1,
%e A174302 749, 548, 333, 173, 76, 27, 7, 1,
%e A174302 Production matrix begins
%e A174302 1, 1,
%e A174302 1, 1, 1,
%e A174302 2, 1, 1, 1,
%e A174302 2, 1, 1, 1, 1,
%e A174302 3, 1, 1, 1, 1, 1,
%e A174302 3, 1, 1, 1, 1, 1, 1,
%e A174302 4, 1, 1, 1, 1, 1, 1, 1
%K A174302 easy,nonn,tabl
%O A174302 0,4
%A A174302 _Paul Barry_, Mar 15 2010