OFFSET
0,3
EXAMPLE
First few rows of the triangle:
1;
1, 2;
1, 4, 1;
1, 6, 3, 2;
1, 8, 6, 8, 1;
1, 10, 10, 20, 5, 2;
1, 12, 15, 40, 15, 12, 1;
...
Row 3 sum = 12 = (1 + 6 + 3 + 2) = A003945(3).
MAPLE
T:=(n, k)->(3-(-1)^k)*binomial(n, k)/2: for n from 0 to 12 do seq(T(n, k), k=0..n) od; # yields sequence in triangular form
CROSSREFS
KEYWORD
nonn,tabl
AUTHOR
Gary W. Adamson, Nov 10 2006
EXTENSIONS
Edited by N. J. A. Sloane, Nov 24 2006
STATUS
approved