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 A147767 #6 Feb 08 2022 23:27:00 %S A147767 1,0,1,2,0,1,2,2,0,1,5,2,2,0,1,6,5,2,2,0,1,6,5,2,2,0,1,13,6,5,2,2,0,1, %T A147767 16,13,6,5,2,2,0,1,30,16,13,6,5,2,2,0,1,40,30,16,13,6,5,2,2,0,1,40,30, %U A147767 16,13,6,5,2,2,0,1 %N A147767 Triangle read by rows, square of A116598. %C A147767 Row sums = A000990: (1, 1, 3, 5, 10, 16, 29, 45, ...). %F A147767 Triangle read by rows, A116598^2. A147766 in every column. %e A147767 First few rows of the triangle: %e A147767 1; %e A147767 0, 1; %e A147767 2, 0, 1; %e A147767 2, 2, 0, 1; %e A147767 5, 2, 2, 0, 1; %e A147767 6, 5, 2, 2, 0, 1; %e A147767 13, 6, 5, 2, 2, 0, 1; %e A147767 16, 13, 6, 5, 2, 2, 0, 1; %e A147767 ... %Y A147767 Cf. A147766, A000990. %K A147767 nonn,tabl %O A147767 0,4 %A A147767 _Gary W. Adamson_, Nov 11 2008 %E A147767 Typo in formula corrected by _Olivier Gérard_, Jul 25 2016