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 A056058 #14 Mar 22 2020 04:00:46
%S A056058 1,2,3,6,10,5,35,70,14,7,462,231,429,858,715,1430,24310,12155,92378,
%T A056058 46189,88179,176358,1352078,676039,52003,104006,22287,44574,2154410,
%U A056058 1077205,33393355,66786710,129644790,64822395,181502706,90751353
%N A056058 Squarefree part of the n-th central binomial coefficient.
%C A056058 a(3387) has 1001 decimal digits. - _Michael De Vlieger_, Jul 14 2017
%H A056058 Michael De Vlieger, <a href="/A056058/b056058.txt">Table of n, a(n) for n = 1..3386</a>
%F A056058 a(n) = A007913(A001405(n)).
%F A056058 For squarefree central binomial coefficients (A046098), a(n)=A001405(n).
%t A056058 Table[Sqrt[Binomial[n, Floor[n/2]]] /. (c_: 1) a_^(b_: 0) :> (c a^b)^2, {n, 36}] (* _Michael De Vlieger_, Jul 14 2017, after _Bill Gosper_ at A007913 *)
%Y A056058 Cf. A048633 for another version.
%K A056058 nonn
%O A056058 1,2
%A A056058 _Labos Elemer_, Jul 26 2000