A214494 Triangle read by rows ; T(n,k) = C(n,k) - 2*C(n,k-1) where C(n,k) is a binomial coefficient .

1, 1, 1, 1, 1, 1, 2, 1, 3, 1, 4, 3, 1, 5, 7, 1, 6, 12, 1, 7, 18, 12, 1, 8, 25, 30, 1, 9, 33, 55, 1, 10, 49, 88, 55, 1, 11, 59, 137, 143, 1, 12, 70, 196, 280, 1, 13, 82, 266, 476, 280, 1, 14, 95, 358, 742, 756

Offset: 0

Author

Philippe Deléham, Jul 19 2012

Keywords

• nonn
• tabf

Examples

			Triangle begins :
1
1
1
1, 1
1, 2
1, 3
1, 4, 3
1, 5, 7
1, 6, 12
1, 7, 18, 12
1, 8, 25, 30
1, 9, 33, 55
1, 10, 49, 88, 55
1, 11, 59, 137, 143
1, 12, 70, 196, 280
1, 13, 82, 266, 476, 280
1, 14, 95, 348, 742, 756
1, 15, 109, 443, 1090, 1498
		

Crossrefs

Cf. A007318, A008315