A157901 Triangle read by rows: A000012 * A157898

1, 1, 1, 2, 2, 2, 2, 4, 4, 4, 3, 6, 10, 8, 8, 3, 9, 16, 24, 16, 16, 4, 12, 28, 40, 56, 32, 32, 4, 16, 40, 80, 96, 128, 64, 64, 5, 20, 60, 120, 216, 224, 288, 128, 128, 5, 25, 80, 200, 336, 560, 512, 640, 256, 256

Offset

0,4

Comments

Multiplication of the lower triangular matrix A157898 from the left by A000012 means: these are partial column sums of A157898.

Links

Table of n, a(n) for n=0..54.

Formula

Row sums = A105635(n+1).

T(n,k) = sum_{l=0..n} A000012(n,l)*A157898(l,k).

Example

First few rows of the triangle, n>=0:
1;
1, 1;
2, 2, 2;
2, 4, 4, 4;
3, 6, 10, 8, 8;
3, 9, 16, 24, 16, 16;
4, 12, 28, 40, 56, 32, 32;
4, 16, 40, 80, 96, 128, 64, 64;
5, 20, 60, 120, 216, 224, 288, 128, 128;
5, 25, 80, 200, 336, 560, 512, 640, 256, 256;

Crossrefs

Sequence in context: A195427 A006643 A080217 * A350697 A327441 A335855

Adjacent sequences: A157898 A157899 A157900 * A157902 A157903 A157904

Keyword

nonn,tabl

Author

Gary W. Adamson & Roger L. Bagula, Mar 08 2009

Extensions

Edited by the Associate Editors of the OEIS, Apr 10 2009

Status

approved