A173050 Triangle, read by rows, given by [0,1,1,1,1,1,1,1,...] DELTA [1,0,1,0,2,0,3,0,4,0,5,0,6,0,...] where DELTA is the operator defined in A084938.

1, 0, 1, 0, 1, 1, 0, 2, 3, 1, 0, 5, 10, 6, 1, 0, 14, 36, 31, 10, 1, 0, 42, 135, 156, 77, 15, 1, 0, 132, 518, 771, 534, 169, 21, 1, 0, 429, 2015, 3745, 3451, 1610, 345, 28, 1, 0, 1430, 7906, 17897, 21094, 13569, 4537, 676, 36, 1, 0, 4862, 31195, 84278, 123203, 103986

Offset: 0

Author

Philippe Deléham, Feb 08 2010

Keywords

• nonn
• tabl

Examples

			Triangle begins:
  1
  0,  1
  0,  1,  1
  0,  2,  3,  1
  0,  5, 10,  6,  1
  0, 14, 36, 31, 10, 1
  ...
		

Crossrefs

Cf. A000108, A074664, A084938.

Formula

Sum_{k=0..n} T(n,k) = A074664(n+1).

Extensions

Corrected by Philippe Deléham, Feb 08 2010