This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A295945 #5 Nov 30 2017 19:11:07
%S A295945 1,-1,2,-3,0,30,-240,1470,-6720,12600,226800,-4296600,48787200,
%T A295945 -407206800,1816214400,19347728400,-691775884800,12223324713600,
%U A295945 -155222158291200,1206712825718400,6182374444646400,-501335892869011200,12800637574960435200,-226664355546012384000,2645964108636142694400
%N A295945 Expansion of e.g.f. 1/(1 + x/(1 + x^2/(2 + x^3/(3 + x^4/(4 + x^5/(5 + x^6/(6 + x^7/(7 + ...)))))))), a continued fraction.
%t A295945 nmax = 24; CoefficientList[Series[1/(1 + ContinuedFractionK[x^k, k, {k, 1, nmax}]), {x, 0, nmax}], x] Range[0, nmax]!
%Y A295945 Cf. A007325, A295944.
%K A295945 sign
%O A295945 0,3
%A A295945 _Ilya Gutkovskiy_, Nov 30 2017