A124220 Transpose table A123685 then subtract, term by term, from table A047969.

0, 1, 0, 0, 2, 0, 1, 1, 4, 0, 0, 5, 5, 8, 0, 1, 2, 23, 19, 16, 0, 0, 8, 18, 101, 65, 32, 0, 1, 3, 58, 110, 431, 211, 64, 0

Offset: 1

Author

Alford Arnold, Oct 29 2006

Keywords

• easy
• nonn
• tabl

Examples

			Row six of A047969 is 1 9 37 65 31 1
Row six of A123685^T is 0 7 14 46 15 1
so row six of a(n) is 1 2 23 19 16 0
		

Crossrefs

The sequence of row sums is 0 1 2 6 18 61 224 ... = A123639. The sequence of row sums for table A123685 is 1 1 3 8 25 83 299 ... = A123638. The sequence of row sums for table A047969 is 1 2 5 14 43 144 523 ... = A047970

Cf. A047970 A123638 A123639.

Formula

A124220(n) = A047969(n) - Trn(A123685).