A152201 Triangle read by rows, A000012 * A152198

1, 2, 3, 1, 4, 2, 5, 4, 1, 6, 6, 2, 7, 9, 5, 1, 8, 12, 8, 2, 9, 16, 14, 6, 1, 10, 20, 20, 10, 2, 11, 25, 30, 20, 7, 1, 12, 30, 40, 30, 12, 2, 13, 36, 55, 50, 27, 8, 1

Offset

0,2

Comments

Row sums = A027383: (1, 2, 4, 6, 10, 14, 22, 30,...).

Links

Table of n, a(n) for n=0..48.

Formula

A000012 * A152198 = partial sums of A152198 column terms.

Example

First few rows of the triangle =
1;
2;
3, 1;
4, 2;
5, 4, 1;
6, 6, 2;
7, 9, 5, 1;
8, 12, 8, 2;
9, 16, 14, 6, 1;
10, 10, 20, 20, 2;
11, 25, 30, 20, 7, 1;
12, 30, 40, 30, 12, 2;
13, 36, 55, 50, 27, 8, 1;
...

Crossrefs

A152198, A027383

Sequence in context: A023131 A356625 A026276 * A265579 A336879 A340313

Adjacent sequences: A152198 A152199 A152200 * A152202 A152203 A152204

Keyword

nonn,tabl

Author

Gary W. Adamson, Nov 29 2008

Status

approved