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 A063729 #12 Jun 25 2018 22:57:42
%S A063729 2,7,8,14,32,54,60,72,84,120,196,252,312,378,512,540,860,990,1020,
%T A063729 1350,1488,1560,2190,2232,3084,3144,3288,3444,3456,4620,7740,8520,
%U A063729 9720,13080,13500,19230,19590,20088,21120,27090,29064,29232,31500,42336
%N A063729 Numbers k such that sigma(k)+1 is a square and sets a new record for such squares.
%H A063729 Harry J. Smith, <a href="/A063729/b063729.txt">Table of n, a(n) for n = 1..150</a>
%o A063729 (PARI) j=[]; for(n=1,70000,x=sigma(n)+1; if(issquare(x),b=x; if(b>a,a=b; \ j=concat(j,n)))); j
%o A063729 (PARI) { n=0; a=-1; for (m=1, 10^9, if (issquare(b=sigma(m) + 1), if (b>a, a=b; write("b063729.txt", n++, " ", m); if (n==150, break))) ) } \\ _Harry J. Smith_, Aug 28 2009
%Y A063729 Cf. A063531.
%K A063729 nonn
%O A063729 1,1
%A A063729 _Jason Earls_, Aug 12 2001