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 A158905 #5 Jun 02 2025 01:28:10 %S A158905 1,3,1,6,1,1,11,2,1,1,16,2,1,1,1,25,3,2,1,1,1,32,3,2,1,1,1,1,44,4,2,2, %T A158905 1,1,1,1,55,4,3,2,1,1,1,1,1,70,5,3,2,2,1,1,1,1,1,81,5,3,2,2,1,1,1,1,1, %U A158905 1,104,6,4,3,2,2,1,1,1,1,1,1 %N A158905 Triangle read by rows, A000012 * A158902. %C A158905 Row sums = A024916: (1, 4, 8, 15, 21, 33, 41,...). %F A158905 Triangle read by rows, A000012 * A158902; where the A000012 multiplier takes jcolumn sums of triangle A158902 starting from the top. %e A158905 First few rows of the triangle = %e A158905 1; %e A158905 3, 1; %e A158905 6, 1, 1; %e A158905 11, 2, 1, 1; %e A158905 16, 2, 1, 1, 1; %e A158905 25, 3, 2, 1, 1, 1; %e A158905 32, 3, 2, 1, 1, 1, 1; %e A158905 44, 4, 2, 2, 1, 1, 1, 1; %e A158905 55, 4, 3, 2, 1, 1, 1, 1, 1; %e A158905 70, 5, 3, 2, 2, 1, 1, 1, 1, 1; %e A158905 81, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1; %e A158905 104, 6, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1; %e A158905 117, 6, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1; %e A158905 138, 7, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1; %e A158905 ... %Y A158905 Cf. A158902, A024916 %K A158905 nonn,tabl %O A158905 1,2 %A A158905 _Gary W. Adamson_ & _Mats Granvik_, Mar 29 2009