A144156 Eigentriangle, row sums = A006318.

1, 1, 1, 3, 1, 2, 11, 3, 2, 6, 45, 11, 6, 6, 22, 197, 45, 22, 18, 22, 90, 903, 197, 90, 66, 66, 90, 394, 4279, 903, 394, 270, 242, 270, 394, 1806, 20793, 4279, 1806, 1182, 990, 990, 1182, 1806, 8558, 103049, 20793, 8558, 5418, 4334, 4050, 4334, 5418, 8558

Offset: 0

Author

Gary W. Adamson, Sep 12 2008

Keywords

• nonn
• tabl

Comments

Row sums = A006318. Left border = A001003.

Sum of n-th row terms = rightmost term of next row.

Examples

			First few rows of the triangle =
1;
1, 1;
3, 1, 2;
11, 3, 2, 6;
45, 11, 6, 6, 22;
197, 45, 22, 18, 22, 90;
903, 197, 90, 66, 66, 90, 394;
4279, 903, 394, 270, 242, 270, 394, 1806;
...
Row = (11, 3, 2, 6) = termwise products of (11, 3, 1, 1) and (1, 1, 2, 6) = (11*1, 3*1, 1*2, 1*6).
		

Crossrefs

Cf. A001003, A006318.

Formula

Triangle read by rows, T(n,k) = A001003(n-k)*A006318(k-1) with A006318(-1)=1. (corrected by R. J. Mathar, Jul 19 2016)