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 A065738 #13 Dec 13 2024 12:38:39
%S A065738 1,4,16,64,225,900,3364,12769,48400,184041,703921,2702736,10394176,
%T A065738 40106889,155102116,601034256,2333566249,9075039169,35345128009,
%U A065738 137845868176,538256995600,2104098203601,8233427666025,32247599617809
%N A065738 Largest square <= binomial(2n,n).
%H A065738 Harry J. Smith, <a href="/A065738/b065738.txt">Table of n, a(n) for n = 1..200</a>
%F A065738 a(n) = A048760(A000984(n)).
%o A065738 (PARI) a(n) = { sqrtint(binomial(2*n, n))^2 } \\ _Harry J. Smith_, Oct 29 2009
%Y A065738 Cf. A048760, A000984, A065730-A065741.
%K A065738 easy,nonn
%O A065738 1,2
%A A065738 _Labos Elemer_, Nov 15 2001
%E A065738 Terms corrected and extended by _Harry J. Smith_, Oct 29 2009