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 A081457 #20 Jun 04 2023 01:51:16 %S A081457 1,2,4,6,12,36,120,240,720,2520,10080,30240,110880,443520,1814400, %T A081457 6652800,26611200,133056000,518918400,2075673600,10378368000, %U A081457 58118860800,261534873600,1270312243200,5928123801600,29640619008000,168951528345600,844757641728000,4505374089216000,25342729251840000 %N A081457 a(n) = A081456(n)^(1/2). %H A081457 Max Alekseyev, <a href="/A081457/b081457.txt">Table of n, a(n) for n = 1..50</a> %F A081457 a(n) equals smallest integer m>0 such that A086435(m^2)=n-1. - _Max Alekseyev_, Jul 16 2009 %Y A081457 Cf. A081454, A081455, A081456, A083489. %K A081457 nonn %O A081457 1,2 %A A081457 _Amarnath Murthy_, Mar 21 2003 %E A081457 More terms from _David Garber_, Jun 17 2003 %E A081457 More terms from _Ray G. Opao_, Aug 01 2005 %E A081457 Corrected and extended by _R. J. Mathar_, Nov 12 2006 %E A081457 More terms from _Max Alekseyev_, Jun 05, Jul 16 2009 %E A081457 Corrected and extended by _Max Alekseyev_, Jun 03 2023