A185624 Triangle, read by rows, equal to the matrix square of triangle A185620.
1, 2, 1, 3, 2, 1, 6, 7, 2, 1, 18, 28, 11, 2, 1, 79, 142, 66, 15, 2, 1, 463, 913, 470, 120, 19, 2, 1, 3396, 7244, 3997, 1098, 190, 23, 2, 1, 30073, 69004, 40079, 11587, 2122, 276, 27, 2, 1, 314037, 771359, 466448, 140092, 26707, 3638, 378, 31, 2, 1, 3796561, 9933242, 6208551, 1921122
Offset: 0
Examples
Triangle begins: 1; 2, 1; 3, 2, 1; 6, 7, 2, 1; 18, 28, 11, 2, 1; 79, 142, 66, 15, 2, 1; 463, 913, 470, 120, 19, 2, 1; 3396, 7244, 3997, 1098, 190, 23, 2, 1; 30073, 69004, 40079, 11587, 2122, 276, 27, 2, 1; 314037, 771359, 466448, 140092, 26707, 3638, 378, 31, 2, 1; 3796561, 9933242, 6208551, 1921122, 377495, 53149, 5742, 496, 35, 2, 1; ... This triangle equals the matrix square, R^2, of triangle R = A185620, which begins: 1; 1, 1; 1, 1, 1; 1, 3, 1, 1; 1, 10, 5, 1, 1; 1, 42, 27, 7, 1, 1; 1, 226, 173, 52, 9, 1, 1; 1, 1525, 1330, 442, 85, 11, 1, 1; 1, 12555, 12134, 4345, 897, 126, 13, 1, 1; ... where R^3 - R^2 + I equals R shifted left one column.
Comments