OFFSET
1,2
COMMENTS
EXAMPLE
Triangle starts:
1;
2, 4;
3, 12, 10;
4, 24, 40, 20;
5, 40, 100, 100, 35;
6, 60, 200, 300, 210, 56;
7, 84, 350, 700, 735, 392, 84;
MAPLE
T:=(n, k)->k*(k+1)*(k+2)*binomial(n, k)/6: for n from 1 to 11 do seq(T(n, k), k=1..n) od; # yields sequence in triangular form
MATHEMATICA
Flatten[Table[(k(k+1)(k+2)Binomial[n, k])/6, {n, 20}, {k, n}]] (* Harvey P. Dale, Jan 23 2016 *)
CROSSREFS
KEYWORD
nonn,tabl
AUTHOR
Gary W. Adamson, Nov 19 2006
EXTENSIONS
Edited by N. J. A. Sloane, Dec 04 2006
STATUS
approved