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 A127371 #11 May 29 2023 13:19:48 %S A127371 1,2,0,2,1,0,3,0,1,0,2,1,1,1,0,4,1,0,0,1,0,2,1,1,1,1,1,0,4,0,2,0,1,0, %T A127371 1,0,3,2,0,1,1,0,1,1,0,4,1,2,1,0,0,1,0,1,0,2,1,1,1,1,1,1,1,1,1,0,6,1, %U A127371 1,0,2,0,1,0,0,0,1,0 %N A127371 Triangle read by rows: A051731 * A054521, as infinite lower triangular matrices. %C A127371 Row sums = n, left column = d(n), (A000005: 1, 2, 2, 3, 2, 4, 2, ...). %F A127371 Inverse Moebius transform of A054521. %e A127371 First few rows of the triangle: %e A127371 1; %e A127371 2, 0; %e A127371 2, 1, 0; %e A127371 3, 0, 1, 0; %e A127371 2, 1, 1, 1, 0; %e A127371 4, 1, 0, 0, 1, 0; %e A127371 2, 1, 1, 1, 1, 1, 0; %e A127371 4, 0, 2, 0, 1, 0, 1, 0; %e A127371 3, 2, 0, 1, 1, 0, 1, 1, 0; %e A127371 ... %Y A127371 Cf. A000005, A051731, A054521. %K A127371 nonn,tabl %O A127371 1,2 %A A127371 _Gary W. Adamson_, Jan 12 2007 %E A127371 Definition clarified, a(56) corrected and more terms from _Georg Fischer_, May 29 2023