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 A316663 #10 Jan 15 2025 11:48:14 %S A316663 0,2,8,36,181,1000,5985,38416,262144,1889568,14310835,113379904, %T A316663 936209559,8031810176,71397866601,656100000000,6219777023950, %U A316663 60716992766464,609359740010496,6278211847988224,66317769195774370,717368321110468608,7937902853812916501,89762301673555234816,1036371513660502339855 %N A316663 a(n) = floor(sqrt((2*n)^(n+1))). %H A316663 Andrew Howroyd, <a href="/A316663/b316663.txt">Table of n, a(n) for n = 0..500</a> %F A316663 a(n) = A000196(A085532(n)). - _Andrew Howroyd_, Jan 15 2025 %o A316663 (PARI) a(n)=sqrtint((2*n)^(n+1)) \\ _Andrew Howroyd_, Jan 15 2025 %Y A316663 Cf. A000196, A085532, A316661. %K A316663 nonn,easy %O A316663 0,2 %A A316663 _Greg Huber_, Jul 09 2018