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 A137504 #6 Oct 23 2019 16:33:33
%S A137504 1,1,3,4,8,11,21,28,47,64,100,135,205,273,398,530,749,989,1373,1796,
%T A137504 2446,3183,4264,5509,7294,9357,12245,15623,20234,25663,32964,41569,
%U A137504 52970,66472,84090,105006,132013,164072,205052,253770,315426,388749,480846,590276,726741
%N A137504 Limiting values of A136406: a(n) = A136406(m,m-n) for any m >= 2n.
%H A137504 Andrew Howroyd, <a href="/A137504/b137504.txt">Table of n, a(n) for n = 0..250</a>
%o A137504 (PARI)
%o A137504 P(k, w, n)={prod(i=1, k, 1 - x^(i*w) + O(x*x^(n-k*w)))}
%o A137504 seq(n)={my(m=2*n); Vec(polcoef(prod(w=1, sqrtint(m), sum(k=0, m\w^2, (x^w*y)^(k*w) / P(k,w^2,m))), m))[1..n]} \\ _Andrew Howroyd_, Oct 23 2019
%Y A137504 Cf. A136406.
%K A137504 nonn
%O A137504 0,3
%A A137504 _Benoit Jubin_, Apr 22 2008
%E A137504 Terms a(21) and beyond from _Andrew Howroyd_, Oct 22 2019