A134239 A127899(unsigned) * A007318.

1, 4, 2, 6, 9, 3, 8, 20, 16, 4, 10, 35, 45, 25, 5, 12, 54, 96, 84, 36, 6, 14, 77, 175, 210, 140, 49, 7, 16, 104, 288, 440, 400, 216, 64, 8, 18, 135, 441, 819, 945, 693, 315, 81, 9, 20, 170, 640, 1400, 1960, 1820, 1120, 440, 100, 10

Offset: 0

Author

Gary W. Adamson, Oct 14 2007

Keywords

• nonn
• tabl

Examples

			First few rows of the triangle are:
1;
4, 2;
6, 9, 3;
8, 20, 16, 4;
10, 35, 45, 25, 5;
12, 54, 96, 84, 36, 6;
14, 77, 175, 210, 140, 49, 7;
...
Row 3 = (8, 20, 16, 4) = 4 * (2, 5, 4, 1), where (2, 5, 4, 1) = row 3 of A029653, (2,1) Pascal's triangle.
		

Links

• Reinhard Zumkeller, Rows n = 0..125 of triangle, flattened

Crossrefs

Cf. A127899, A029653, A128543 (row sums).

Programs

Haskell

a134239 n k = a134239_tabl !! n !! k
a134239_row n = a134239_tabl !! n
a134239_tabl = [1] : zipWith (map . (*))
               [2..] (map reverse $ tail a029635_tabl)
-- Reinhard Zumkeller, Nov 14 2014

Formula

A127899(unsigned) * A007318.

Triangle, T(n,k) = (n+1) * A029635(n,n-k) for n > 0.

Extensions

Corrected by Philippe Deléham, Oct 17 2007

Formula corrected by Reinhard Zumkeller, Nov 14 2014