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 A127168 #6 May 31 2023 15:57:17 %S A127168 1,4,1,6,0,1,12,4,0,1,10,0,0,0,1,24,6,4,0,0,1,14,0,0,0,0,0,1,32,12,0, %T A127168 4,0,0,0,1,27,0,6,0,0,0,0,0,1,40,10,0,0,4,0,0,0,0,1,22,0,0,0,0,0,0,0, %U A127168 0,0,1,72,24,12,6,0,4,0,0,0,0,0,1,26,0,0,0,0,0,0,0,0,0,0,0,1 %N A127168 Triangle read by rows: square of A126988. %C A127168 Row sums = A060640: (1, 5, 7, 17, 11, 35, 15, 49...) Left column = A038040, d(n)*n: (1, 4, 6, 12, 10, 24, 14, 32, 27, 40...). A127168 * A008683 = A018804, (1, 3, 5, 8, 9, 15...); where A008683 = the Mobius sequence. %e A127168 First few rows of the triangle are: %e A127168 1; %e A127168 4, 1; %e A127168 6, 0, 1; %e A127168 12, 4, 0, 1 %e A127168 10, 0, 0, 0, 1 %e A127168 24, 6, 4, 0, 0, 1 %e A127168 14, 0, 0, 0, 0, 0, 1; %e A127168 32, 12, 0, 4, 0, 0, 0, 1; %e A127168 ... %Y A127168 Cf. A008683, A018804, A038040, A060640, A127169. %K A127168 nonn,tabl %O A127168 0,2 %A A127168 _Gary W. Adamson_, Jan 06 2007 %E A127168 a(20) = 1 inserted and more terms from _Georg Fischer_, May 31 2023