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%I #3 Oct 12 2012 14:40:20
%S 1,29,2899,625381,235735025,137662456849,115219635641083,
%T 130892567494940777,193870813073375001313,362981045220391075931461,
%U 838251579579056365127865923,2340586894706172958195272669517,7772441664087128321443493161452817
%N Alternating row sums of array A091747 (generalized Stirling2 array (7,2)).
%C The first negative term is the 159 digit number a(43)=-2116278545846...33655549.
%F a(n)=sum(A091747(n, k)*(-1)^k, k=2..2*n), n>=1.
%Y Cf. A091749 (row sums of A091747).
%K sign,easy
%O 1,2
%A _Wolfdieter Lang_, Feb 27 2004
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