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 A106213 #3 Mar 30 2012 18:36:45 %S A106213 0,3,6,24,33,42,45,54,60,66,69,78,87,93,102,108,111,120,129,144,153, %T A106213 162,165,174,183,186,195,204,213,216,225,228,231,237,240,258,261,267, %U A106213 279,285,300,306,312,321,333,336,351,363,366,384,390,408,414,417,420,429 %N A106213 Positions n where A083349(n) = 1 (mod 3). %C A106213 A083349 is the minimal permutation of the positive integers having a self-convolution cube-root. %F A106213 a(n) = 0 (mod 3) for n>=0. %o A106213 (PARI) %Y A106213 Cf. A083349, A106214, A083350. %K A106213 nonn %O A106213 0,2 %A A106213 _Paul D. Hanna_, May 01 2005