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 A081456 #21 Jun 04 2023 01:51:06 %S A081456 1,4,16,36,144,1296,14400,57600,518400,6350400,101606400,914457600, %T A081456 12294374400,196709990400,3292047360000,44259747840000, %U A081456 708155965440000,17703899136000000,269276305858560000,4308420893736960000,107710522343424000000,3377801980689776640000 %N A081456 Product of entries in n-th row of triangle in A081454. %H A081456 Max Alekseyev, <a href="/A081456/b081456.txt">Table of n, a(n) for n = 1..50</a> %F A081456 a(n) equals smallest integer square m^2 such that A086435(m^2)=n-1. - _Max Alekseyev_, Jul 16 2009 %Y A081456 Cf. A081454, A081455, A081457. %K A081456 nonn %O A081456 1,2 %A A081456 _Amarnath Murthy_, Mar 21 2003 %E A081456 More terms from _David Garber_, Jun 17 2003 %E A081456 More terms from _Ray G. Opao_, Aug 01 2005 %E A081456 Corrected and extended by _R. J. Mathar_, Nov 12 2006 %E A081456 More terms from _Max Alekseyev_, Jun 05, Jul 16 2009 %E A081456 Corrected and extended by _Max Alekseyev_, Jun 03 2023