OFFSET
0,1
COMMENTS
Row sums are 2, 4, 12, 52, 300, 2164, 18732, 189172, 2183340, 28349044, ... = 2 * A000629.
FORMULA
EXAMPLE
Triangle begins:
2
2, 2
3, 6, 3
7, 19, 19, 7
25, 75, 100, 75, 25
121, 391, 570, 570, 391, 121
721, 2583, 3962, 4200, 3962, 2583, 721
5041, 20287, 33852, 35406, 35406, 33852, 20287, 5041
40321, 181695, 338690, 364140, 333648, 364140, 338690, 181695, 40321
MATHEMATICA
w[n_, m_] = Sum[(-1)^(j + m)*(j + 1)^n*Binomial[m, j], {j, 0, m}] +
Sum[(-1)^( j - m + n )*(1 + j)^n Binomial[ -m + n, j], {j, 0, n - m}];
Table[Table[w[n, m], {m, 0, n}], {n, 0, 10}];
Flatten[%]
CROSSREFS
KEYWORD
nonn,tabl
AUTHOR
Roger L. Bagula, Feb 16 2009
STATUS
approved