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.
rev:= proc(n) local L,i; L:= convert(n,base,2); add(L[-i]*2^(i-1),i=1..nops(L)) end proc: select(n -> issqr(rev(n)), [seq(i^2,i=1..100000)]); # Robert Israel, Jun 06 2023
Select[Range[10^5]^2, IntegerQ@ Sqrt@ FromDigits[ Reverse@ IntegerDigits[#, 2], 2] &] (* Giovanni Resta, May 05 2016 *)
lista(nn) = {for (n=1, nn, if (issquare(subst(Polrev(binary(n^2)), x, 2)), print1(n^2, ", ")););} \\ Michel Marcus, May 05 2016
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