A144034 Eigentriangle read by rows, T(n,k) = A123932(n-k+1)*A046717(k).

1, 4, 1, 4, 4, 5, 4, 4, 20, 13, 4, 4, 20, 52, 41, 4, 4, 20, 52, 164, 121, 4, 4, 20, 52, 164, 484, 365, 4, 4, 20, 52, 164, 484, 1460, 1093, 4, 4, 20, 52, 164484, 1460, 4372, 3281, 4, 4, 20, 52, 164, 484, 1460, 4372, 13124, 9841

Offset: 1

Author

Gary W. Adamson, Sep 07 2008

Keywords

• nonn
• tabl

Comments

Row sums = A046717 shifted: (1, 5, 13, 41, 121,...). Right border = A046717.

Sum of n-th row terms = rightmost term of (n+1)-th row.

Examples

			First few rows of the triangle =
1;
4, 1;
4, 4, 5;
4, 4, 20, 13;
4, 4, 20, 52, 41;
4, 4, 20, 52, 164, 121;
4, 4, 20, 52, 164, 484, 365;
...
Row 4 = (4, 4, 20, 13) = termwise products (4, 4, 4, 1) and (1, 1, 5, 13).
		

Crossrefs

Cf. A123932, A046717.

Formula

Eigentriangle read by rows, T(n,k) = A123932(n-k+1)*A046717(k)