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 A188023 #6 May 09 2023 07:31:30 %S A188023 1,1,2,0,0,3,1,2,0,4,0,0,0,0,5,0,0,3,0,0,6,0,0,0,0,0,0,7,1,2,0,4,0,0, %T A188023 0,8,0,0,0,0,0,0,0,0,9,0,0,0,0,5,0,0,0,0,10,0,0,0,0,0,0,0,0,0,0,11,0, %U A188023 0,3,0,0,6,0,0,0,0,0,12 %N A188023 Triangle read by rows, T(n,k) = k*A115361(n-1,k-1). %C A188023 Triangle obtained by multiplying the lower triangular matrices A115361 and A127648. %e A188023 First few rows of the triangle = %e A188023 1 %e A188023 1, 2 %e A188023 0, 0, 3 %e A188023 1, 2, 0, 4 %e A188023 0, 0, 0, 0, 5 %e A188023 0, 0, 3, 0, 0, 6 %e A188023 0, 0, 0, 0, 0, 0, 7 %e A188023 1, 2, 0, 4, 0, 0, 0, 8 %e A188023 0, 0, 0, 0, 0, 0, 0, 0, 9 %e A188023 0, 0, 0, 0, 5, 0, 0, 0, 0, 10 %e A188023 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 11 %e A188023 0, 0, 3, 0, 0, 6, 0, 0, 0, 0, 0, 12 %e A188023 ... %Y A188023 Cf. A115361, A127648, A129527 (row sums) %K A188023 tabl,nonn %O A188023 1,3 %A A188023 _Gary W. Adamson_, Mar 19 2011