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 A065790 #5 Sep 17 2023 21:32:37 %S A065790 64,17,604,9612,85848855,109457393440691436, %T A065790 16484027824615378535694780556419522, %U A065790 2537811713051483817817710620248313487995814710180147690293469081793581 %N A065790 a(1) = 64; for n > 1, a(n) is the smallest integer > 0 such that the concatenation a(n)a(n-1)...a(2)a(1) is a square. %C A065790 a(n) = A061361(n+1) for n > 1. %Y A065790 Cf. A061359, A061361, A065691, A065788, A065789. %K A065790 base,nonn %O A065790 1,1 %A A065790 _Klaus Brockhaus_, Nov 19 2001