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A301770 G.f. A(x) satisfies: A(x) = 1/(1 - x*A(x) - x^2*A(x)^2/(1 - x*A(x) - 2*x^2*A(x)^2/(1 - x*A(x) - 3*x^2*A(x)^2/(1 - ...)))), a continued fraction. 0

%I #6 Nov 05 2021 05:56:23

%S 1,1,3,11,47,217,1061,5399,28337,152381,835823,4660779,26357111,

%T 150872165,872878665,5098306063,30034591105,178326873753,

%U 1066472979083,6421120346267,38907397325295,237182461204097,1454326514077709,8968048205494983,55608797571427793,346716786105033077

%N G.f. A(x) satisfies: A(x) = 1/(1 - x*A(x) - x^2*A(x)^2/(1 - x*A(x) - 2*x^2*A(x)^2/(1 - x*A(x) - 3*x^2*A(x)^2/(1 - ...)))), a continued fraction.

%F a(n) = [x^n] (Sum_{k>=0} A000085(k)*x^k)^(n+1)/(n + 1).

%e G.f. A(x) = 1 + x + 3*x^2 + 11*x^3 + 47*x^4 + 217*x^5 + 1061*x^6 + 5399*x^7 + 28337*x^8 + ...

%t Table[SeriesCoefficient[(1 + Sum[(I/Sqrt[2])^k * HermiteH[k, -I/Sqrt[2]] * x^k, {k, 1, n}])^(n+1)/(n+1), {x, 0, n}], {n, 0, 30}] (* _Vaclav Kotesovec_, Nov 05 2021 *)

%Y Cf. A000085, A224922, A301409.

%K nonn

%O 0,3

%A _Ilya Gutkovskiy_, Mar 26 2018

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Last modified March 29 08:13 EDT 2024. Contains 371265 sequences. (Running on oeis4.)