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A368446 Expansion of e.g.f. exp(-x) / (1 + log(1 - 2*x)). 1

%I #9 Dec 25 2023 10:01:46

%S 1,1,9,81,1025,16177,306793,6791201,171849153,4892782241,154792866953,

%T 5387090968113,204528939571521,8412441383512657,372629008281155177,

%U 17684630326318986881,895251144144309285505,48152984520621412552257

%N Expansion of e.g.f. exp(-x) / (1 + log(1 - 2*x)).

%F a(n) = (-1)^n + Sum_{k=1..n} 2^k * (k-1)! * binomial(n,k) * a(n-k).

%o (PARI) a_vector(n) = my(v=vector(n+1)); for(i=0, n, v[i+1]=(-1)^i+sum(j=1, i, 2^j*(j-1)!*binomial(i, j)*v[i-j+1])); v;

%Y Cf. A330149, A368447.

%Y Cf. A368286.

%K nonn

%O 0,3

%A _Seiichi Manyama_, Dec 24 2023

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Last modified August 11 02:58 EDT 2024. Contains 375059 sequences. (Running on oeis4.)