A131345 Triangle read by rows: A065941 * A046854 as infinite lower triangular matrices.
1, 2, 1, 3, 2, 1, 5, 5, 3, 1, 8, 10, 8, 3, 1, 13, 20, 19, 10, 4, 1, 21, 38, 42, 26, 14, 4, 1, 34, 71, 89, 65, 41, 16, 5, 1, 55, 130, 182, 151, 110, 50, 21, 5, 1, 89, 235, 363, 338, 276, 146, 72, 23, 6, 1, 144, 420, 709, 730, 659, 392, 223, 83, 29, 6, 1
Offset: 0
Examples
First few rows of the triangle are: 1; 2, 1; 3, 2, 1; 5, 5, 3, 1; 8, 10, 8, 3, 1; 13, 20, 19, 10, 4, 1; 21, 38, 42, 26, 14, 4, 1; ...
Extensions
a(49) split and more terms from Georg Fischer, May 29 2023
Comments