A130302 A000012 * A130296.

1, 3, 1, 6, 2, 1, 10, 3, 2, 1, 15, 4, 3, 2, 1, 21, 5, 4, 3, 2, 1, 28, 6, 5, 4, 3, 2, 1, 36, 7, 6, 5, 4, 3, 2, 1

Offset

1,2

Comments

Row sums = n^2. A130303 = A130296 * A000012.

Links

Table of n, a(n) for n=1..36.

Formula

A000012 * A130296 as infinite lower triangular matrices. Triangular series as the left border; (1,2,3...) in all other columns.

Example

First few rows of the triangle are:
1;
3, 1;
6, 2, 1;
10, 3, 2, 1;
15, 4, 3, 2, 1;
21, 5, 4, 3, 2, 1;
...

Crossrefs

Cf. A130296, A130303.

Sequence in context: A145791 A348661 A322041 * A270103 A134546 A152193

Adjacent sequences: A130299 A130300 A130301 * A130303 A130304 A130305

Keyword

nonn,tabl

Author

Gary W. Adamson, May 20 2007

Status

approved