%I A119373
%S A119373 1,2,6,20,70,253,938,3546,13617,52967,208255,826315,3304456,13304924,
%T A119373 53891402,219442686,897772983,3688451380,15211545938,62950542636,
%U A119373 261329456566,1087985751336,4541524025769,19003488710465,79696345430789
%N A119373 A lower diagonal of pendular trinomial triangle A119369.
%F A119373 G.f.: A(x) = B(x)^2/(1+x - x*B(x)) = B(x)^2*G(x) = B(x)*H(x), where B(x) 
               is g.f. of A119370, G(x) is g.f. of A119371 and H(x) is g.f. of A119372.
%o A119373 (PARI) {a(n)=polcoeff(8*(1+x)/((1+x^2)+sqrt((1+x^2)^2-4*x*(1+x)+x*O(x^n)))^2 
               /(1+4*x+x^2 + sqrt((1+4*x+x^2)^2 - 4*x*(1+x)*(3+2*x)+x*O(x^n))),n)}
%Y A119373 Cf. A119369, A119370, A119371, A119372, A119374, A119375, A119376.
%Y A119373 Sequence in context: A071976 A000984 A087433 this_sequence A151284 A049138 
               A095929
%Y A119373 Adjacent sequences: A119370 A119371 A119372 this_sequence A119374 A119375 
               A119376
%K A119373 nonn
%O A119373 0,2
%A A119373 Paul D. Hanna (pauldhanna(AT)juno.com), May 17 2006