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 A065732 #15 Dec 13 2024 12:38:53
%S A065732 1,4,4,16,25,64,121,256,484,1024,2025,4096,8100,16384,32761,65536,
%T A065732 131044,262144,524176,1048576,2096704,4194304,8386816,16777216,
%U A065732 33547264,67108864,134212225,268435456,536848900,1073741824,2147395600,4294967296,8589767761,17179869184
%N A065732 Largest square <= 2^n.
%H A065732 Harry J. Smith, <a href="/A065732/b065732.txt">Table of n, a(n) for n = 1..200</a>
%F A065732 a(n) = A048760(A000079(n)) = A048760(2^n).
%t A065732 Table[Floor[Sqrt[2^w]//N]^2, {w, 1, 50}]
%o A065732 (PARI) a(n) = { sqrtint(2^n)^2 } \\ _Harry J. Smith_, Oct 28 2009
%Y A065732 Cf. A048760, A000079, A065730-A065741.
%K A065732 easy,nonn
%O A065732 1,2
%A A065732 _Labos Elemer_, Nov 15 2001