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 A351358 #12 Mar 13 2022 19:31:23 %S A351358 0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,1,1,0,0,0,0,1,1,1,0,0,0,0,1,2,1, %T A351358 1,0,0,0,0,1,3,3,1,1,0,0,0,0,1,4,6,4,1,1,0,0,0,0,1,5,10,10,5,1,1,0,0, %U A351358 0,0,1,6,15,20,14,5,1,1,0,0,0,0,1,7,21,35,34,18,6,1,1,0,0,0,0,1,8,28,56,68,50,22,6,1,1 %N A351358 Irregular triangle read by rows T(n,k): number of binary necklaces with n beads, k of them black, and at least four consecutive black beads. %H A351358 Marko R. Riedel et al., <a href="https://math.stackexchange.com/questions/4376420/">Necklaces made of black and white beads</a>, Math StackExchange, Feb 2022. %F A351358 Row sums are A351361. %e A351358 Triangle begins: %e A351358 0, 0; %e A351358 0, 0, 0; %e A351358 0, 0, 0, 0; %e A351358 0, 0, 0, 0, 1; %e A351358 0, 0, 0, 0, 1, 1; %e A351358 0, 0, 0, 0, 1, 1, 1; %e A351358 0, 0, 0, 0, 1, 2, 1, 1; %e A351358 0, 0, 0, 0, 1, 3, 3, 1, 1; %Y A351358 Cf. A351356, A351357, A351359, A351360, A351361. %K A351358 nonn,tabf %O A351358 1,33 %A A351358 _Marko Riedel_, Feb 08 2022