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%I #8 Aug 13 2012 08:15:41
%S 1,-1,0,7,-24,-61,1200,-4493,-48384,781319,-1804800,-85444193,
%T 1210361856,1847527499,-288162201600,3428482320907,33720680349696,
%U -1637781983297521,14158399925452800,431041350297034807,-14236987086964260864
%N E.g.f. 1/(1+sin(x)+sin(x)^2).
%F a(n) = (-1)^n*A002969(n). - _Arkadiusz Wesolowski_, Aug 13 2012
%K sign
%O 0,4
%A _N. J. A. Sloane_.
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