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 A111582 #4 Mar 30 2012 18:36:50 %S A111582 1,3,6,11,16,22,28,33,41,51,61,76,93,107,125,144,159,178,200,215,233, %T A111582 256,271,288,314,332,349,377,391,407,435,450,466,497,517,538,574,595, %U A111582 619,653,679,705,750,784,816,859,888,919,961,1002,1039,1102,1145,1186 %N A111582 G.f.: A(x) = ( G(x)^3 - G(x^3) - 3*x*(1+x)/(1-x^3) )/(9*x^2) where G(x) is the g.f. of A110628. %C A111582 A110628 is the trisection of A083953; surprisingly, the self-convolution cube of A110628 is congruent modulo 9 to A083953, which consists entirely of 1's, 2's and 3's. %Y A111582 Cf. A110628, A083953. %K A111582 nonn %O A111582 0,2 %A A111582 _Paul D. Hanna_, Aug 28 2005