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%I #2 Mar 31 2012 13:20:14
%S 1,5,61,959,20821,545279,17128201,620355263,25594230937,1181868481463,
%T 60478614651577,3395069184089687,207524762064350473,
%U 13718967902774331287,975392219493426602569,74215525935813198093815
%N Alternating row sums of triangle A134280 (S2(6)').
%F a(n)=sum(A134280(n,m)*(-1)^(m-1),m=1..n), n>=1.
%Y Cf. A134281 (row sums of triangle A134280).
%K nonn,easy
%O 1,2
%A _Wolfdieter Lang_ Nov 13 2007
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