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 A193650 #5 Mar 30 2012 18:57:38 %S A193650 1,0,3,7,10,31,24,127,136,292,352,2047,1664,8191,5504,9664,32896, %T A193650 131071,116736,524287,419840,603904,1398784,8388607,7897088,17318416 %N A193650 Q-residue of the coefficient triangle (A076699) of the cyclotomic polynomials, where Q is the triangular array (t(i,j)) given by t(i,j)=1. (See Comments.) %C A193650 For the definition of Q-residue, see A193649. %t A193650 q[n_, k_] := 1; %t A193650 r[0] = 1; r[k_] := Sum[q[k - 1, i] r[k - 1 - i], {i, 0, k - 1}] %t A193650 p[n_, k_] := Coefficient[Cyclotomic[n, x], x, k] %t A193650 v[n_] := Sum[p[n, k] r[n - k], {k, 0, n}] %t A193650 Table[v[n], {n, 0, 25}] (* A193650 *) %t A193650 TableForm[Table[q[i, k], {i, 0, 4}, {k, 0, i}]] %t A193650 Table[r[k], {k, 0, 8}] (* 2^k *) %t A193650 TableForm[Table[p[n, k], {n, 0, 8}, {k, 0, n}]] (* A076699 *) %Y A193650 Cf. A193649, A076699. %K A193650 nonn %O A193650 0,3 %A A193650 _Clark Kimberling_, Aug 02 2011