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 A171448 #4 Jun 26 2025 14:41:02 %S A171448 1,2,6,24,114,612,3648,23928,171534,1336416,11269476,102661188, %T A171448 1010777052,10778107752,124698353796,1564720622004,21217109251374, %U A171448 308917754417352,4793408454081468,78708576907763868,1359861042837591204 %N A171448 Sequence whose generating function is expressible as a prime-related continued fraction. %C A171448 Hankel transform is the Chernoff sequence A006939. %F A171448 G.f.: 1/(1-2x/(1-x/(1-3x/(1-x/(1-5x/(1-x/(1-7x/(1-x/(1-11x/(1-.... (continued fraction); %F A171448 G.f.: 1/(1-2x-2x^2/(1-4x-3x^2/(1-6x-5x^2/(1-8x-7x^2/(1-12x-11x^2/(1- ... (continued fraction). %Y A171448 Cf. A006939. %K A171448 easy,nonn %O A171448 0,2 %A A171448 _Paul Barry_, Dec 09 2009