A141294 Triangle read by rows, A054523 * A000012, 1<=k<=n.

1, 2, 1, 3, 1, 1, 4, 2, 1, 1, 5, 1, 1, 1, 1, 6, 4, 2, 1, 1, 1, 7, 1, 1, 1, 1, 1, 1, 8, 4, 2, 2, 1, 1, 1, 1, 9, 3, 3, 1, 1, 1, 1, 1, 1, 10, 6, 2, 2, 2, 1, 1, 1, 1, 1, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 12, 8, 6, 4, 2, 2, 1, 1, 1, 1, 1, 1, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 14, 8, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1

Offset

1,2

Comments

Row sums = A018804: (1, 3, 5, 8, 9, 15, 13, 20,...).

Links

Table of n, a(n) for n=1..103.

Formula

Triangle read by rows, A054523 * A000012, 1<=k<=n. By rows, partial sums starting from the right.

Example

First few rows of the triangle =
1;
2, 1;
3, 1, 1;
4, 2, 1, 1;
5, 1, 1, 1, 1;
6, 4, 2, 1, 1, 1;
7, 1, 1, 1, 1, 1, 1;
8, 4, 2, 2, 1, 1, 1, 1;
...

Crossrefs

Cf. A054523, A018804.

Sequence in context: A335123 A182715 A088425 * A174557 A010766 A135841

Adjacent sequences: A141291 A141292 A141293 * A141295 A141296 A141297

Keyword

nonn,tabl

Author

Gary W. Adamson, Aug 02 2008

Status

approved