%I #3 Mar 30 2012 18:37:02
%S 1,24,636,26304,1650456,147705984,17913816576,2830553662464,
%T 565108879101696,139114514096953344,41397845529582959616,
%U 14649251145209922945024,6079754611331559564097536
%N Secondary diagonal of symmetric triangle A126150: a(n) = A126150(n+1,n).
%F a(n) = A126152(n+1) - 3*A126152(n), where A126152 is the main diagonal of triangle A126150.
%Y Cf. A126150; A126151 (column 0), A126152 (diagonal).
%K nonn
%O 0,2
%A _Paul D. Hanna_, Dec 19 2006