A144329 Triangle read by rows, A000012 * A144328

1, 2, 1, 3, 2, 2, 4, 3, 4, 3, 5, 4, 6, 6, 4, 6, 5, 8, 9, 8, 5, 7, 6, 10, 12, 12, 10, 6, 8, 7, 12, 15, 16, 15, 12, 7, 9, 8, 14, 18, 20, 20, 18, 14, 8, 10, 9, 16, 21, 24, 25, 24, 21, 16, 9, 11, 10, 18, 24, 28, 30, 30, 28, 24, 18, 10

Offset

1,2

Comments

Row sums = A004006: (1, 3, 7, 14, 25, 41, 63, 92, 129,...).

Links

Table of n, a(n) for n=1..66.

Formula

Triangle read by rows A000012 * A144328.

Partial sums of A144328 by columns.

Example

First few rows of the triangle =
1;
2, 1;
3, 2, 2;
4, 3, 4, 3;
5, 4, 6, 6, 4;
6, 5, 8, 9, 8, 5;
7, 6, 10, 12 12, 10, 6;
8, 7, 12, 15, 16, 15, 12, 7;
...

Crossrefs

A144328, Cf. A004006

Sequence in context: A102364 A342774 A132923 * A141157 A357213 A137948

Adjacent sequences: A144326 A144327 A144328 * A144330 A144331 A144332

Keyword

nonn,tabl

Author

Gary W. Adamson, Sep 18 2008

Status

approved