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 A144183 #4 Jun 02 2025 00:34:33 %S A144183 1,1,1,3,1,1,9,5,3,3,11,15,11,9,9,17,17,21,17,11,11,35,43,43,47,35,17, %T A144183 17,57,73,81,81,93,57,35,35,91,75,91,99,99,135,91,57,57,161,161,145, %U A144183 161,185,185,229,161,91,91,275,243,243,227,275,347,347,415,275,161,161 %N A144183 Triangle read by rows, A144182 * A000012. %C A144183 Left border = A144181: (1, 1, 3, 9, 11, 17, 35,...) = INVERT transform of A118434. Right border = A144181 shifted. %F A144183 Triangle read by rows, A144182 * A000012; (equivalent to taking partial row sums %F A144183 of A144182 starting from the right). A000012 = an infinite lower triangular matrix with all 1's and the rest zeros. %e A144183 First few rows of the triangle = %e A144183 1; %e A144183 1, 1; %e A144183 3, 1, 1; %e A144183 9, 5, 3, 3; %e A144183 11, 15, 11, 9, 9; %e A144183 17, 17, 21, 17, 11, 11; %e A144183 35, 43, 43, 47, 35, 17, 17; %e A144183 57, 73, 81, 81, 93, 57, 35, 35; %e A144183 91, 75, 91, 99, 99, 135, 91, 57, 57; %e A144183 ... %e A144183 Row 3 = (9, 5, 3, 3) = partial sums from the right of row 3, triangle A144182: (4, 2, 0, 3). %Y A144183 A144182, Cf. A144181, A118434 %K A144183 nonn,tabl %O A144183 0,4 %A A144183 _Gary W. Adamson_, Sep 13 2008