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A214494
Triangle read by rows ; T(n,k) = C(n,k) - 2*C(n,k-1) where C(n,k) is a binomial coefficient .
0
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
0,7
EXAMPLE
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
KEYWORD
nonn,tabf
AUTHOR
Philippe Deléham, Jul 19 2012
STATUS
approved