|
%I #2 Mar 31 2012 13:20:14
%S 1,3,9,15,-159,-3021,-36903,-381249,-3212415,-12995901,315857961,
%T 12457515663,304888863969,6280156107315,113710631625081,
%U 1717208752084479,15528594345353217,-265033870991715069,-22048996644203788215
%N Alternating row sums of triangle A049352 (S1p(4)).
%F a(n)=sum(A049352(n,m)*(-1)^(m-1),m=1..n), n>=1.
%F E.g.f.: 1-exp(-x*(3-3*x+x^2)/(3*(1-x)^3)). Cf. e.g.f. first column of A049352.
%K sign,easy
%O 1,2
%A _Wolfdieter Lang_ Oct 12 2007
|
