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 A111615 #4 Mar 30 2012 18:36:50
%S A111615 1,2,3,4,5,3,7,8,9,5,11,12,13,14,15,16,17,9,19,10,21,11,23,24,25,26,
%T A111615 27,28,29,15,31,32,33,17,35,18,37,19,39,40,41,42,43,22,45,46,47,48,49,
%U A111615 25,51,26,53,54,55,28,57,29,59,60,61,31,63,64,65,66,67,68,69,70,71,36,73
%N A111615 Third upper diagonal of the array in A109626.
%t A111615 f[n_] := f[n] = Block[{a}, a[0] = 1; a[l_] := a[l] = Block[{k = 1, s = Sum[ a[i]*x^i, {i, 0, l - 1}]}, While[ IntegerQ[ Last[ CoefficientList[ Series[(s + k*x^l)^(1/n), {x, 0, l}], x]]] != True, k++ ]; k]; Table[a[j], {j, 0, 80}]]; g[n_, m_] := f[n][[m]]; Table[ g[n, n + 3], {n, 74}]
%Y A111615 Cf. A109626.
%K A111615 nonn
%O A111615 1,2
%A A111615 _Paul D. Hanna_ and _Robert G. Wilson v_, Jul 30 2005