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 A371472 #11 Mar 24 2024 10:48:54 %S A371472 1,3,8,6,9,8,10,23,16,16,16,14,23,10,9,23,45,16,27,16,34,16,33,23,94, %T A371472 23,105,20,77,16,54,91,16,45,19,16,83,27,23,30,58,34,114,16,16,40,133, %U A371472 23,130,94,45,23,75,105,16,38,27,77,145,16,106,54,47,91,49,16,190,45,80,19,123,47,283,83,94,27,40,23,137 %N A371472 Least positive number k such that binomial(k^2,k) is divisible by n^2. %H A371472 Seiichi Manyama, <a href="/A371472/b371472.txt">Table of n, a(n) for n = 1..1000</a> %o A371472 (PARI) a(n) = my(k=1); while(binomial(k^2, k)%n^2>0, k++); k; %Y A371472 Cf. A014062, A081370, A371306. %K A371472 nonn,easy %O A371472 1,2 %A A371472 _Seiichi Manyama_, Mar 24 2024