A108074 Triangle in A071944 with rows reversed.

1, 1, 1, 2, 2, 1, 6, 5, 3, 1, 19, 16, 9, 4, 1, 63, 54, 31, 14, 5, 1, 219, 188, 111, 52, 20, 6, 1, 787, 676, 405, 197, 80, 27, 7, 1, 2897, 2492, 1508, 752, 320, 116, 35, 8, 1, 10869, 9361, 5712, 2900, 1276, 489, 161, 44, 9, 1, 41414, 35702, 21933, 11296, 5095, 2034, 714

Offset: 0

Author

N. J. A. Sloane, Jun 05 2005

Keywords

• nonn
• tabl
• easy

Comments

A convolution triangle of numbers based on A071969. - Philippe Deléham, Sep 15 2005

Examples

			Triangle begins:
   1;
   1,  1;
   2,  2,  1;
   6,  5,  3,  1;
  19, 16,  9,  4,  1; ...
		

Crossrefs

Cf. A071944, A071969.

Formula

T(0, 0) = 1; T(n, k) = 0 if k<0 or if k>n; T(n, k) = Sum_{j>=0} T(n-1, k-1+j) + Sum_{j>=0} T(n-1, k+2+j). - Philippe Deléham, Sep 15 2005

Extensions

More terms from Philippe Deléham, Sep 15 2005