A124221 Triangle read by rows: add A124222(n,k) to A124222(n-1,k).

1, 2, 4, 8, 0, 14, 2, 22, 9, 1, 0, 32, 25, 5, 2, 44, 54, 16, 12, 0, 2, 0, 58, 100, 38, 42, 2, 13, 2, 1, 74, 167, 75, 110, 9, 51, 15, 7, 1, 0, 3, 0, 92, 259, 131, 240, 25, 146, 63, 28, 5, 5, 24, 2, 1, 3, 112, 380, 210, 462, 54, 340, 193, 80, 16, 29, 111, 18, 11, 25, 0, 2, 0, 0, 1, 4, 0

Offset: 1

Author

Alford Arnold, Oct 23 2006

Keywords

• easy
• nonn
• tabf

Comments

Row sums are powers of 2. Row sum sequence for A124222 is A001045.

Examples

			A124222 begins
0
1
1
3
5 0
9 2
13 7 1 0
so A124221 begins
1
2
4
8 0
14 2
22 9 1 0
		

Crossrefs

Cf. A000079 A001045 A124222.

Formula

A124221(n,k) = A124222(n,k) + A124222(n-1,k) for n>0