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%I #7 Apr 16 2021 15:47:14
%S 1,1,0,-2,0,4,12,-8,-48,-56,-144,400,1200,1792,960,16864,-34560,
%T -170816,-320064,-632960,-869376,-15780224,30636288,144493312,
%U 360770304,738095104,2382729216,6661606912,81815537664,-152267942912,-883849860096,-2187970242560,-6499788165120
%N G.f.: 1 + 1!*x/(1 + 2!*x^2/(1 + 3!*x^3/(1 + 4!*x^4/(1 + 5!*x^5/(1 + ...))))).
%o (PARI) a(n) = my(A=1+O(x)); for(i=1, n, A=1+(n-i+1)!*x^(n-i+1)/A); polcoef(A, n);
%Y Cf. A285381, A343428.
%K sign
%O 0,4
%A _Seiichi Manyama_, Apr 16 2021
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