A137631 Left border of triangle A137629.

1, 2, 4, 7, 11, 18, 26, 39, 55, 79, 106, 150, 196, 267

Offset

1,2

Links

Table of n, a(n) for n=1..14.

Formula

A026794 * A000041 = product of the partition triangle and the partitions of n.

Example

a(4) = 7 = (3, 1, 0, 1) dot (1, 1, 2, 3), where (3, 1, 0, 1) = row 4 of the partition triangle A026794 and (1, 1, 2, 3) = the first 4 terms of A000041.

Crossrefs

Cf. A000041, A026794, A137629.

Sequence in context: A129929 A360891 A073738 * A003403 A261666 A034412

Adjacent sequences: A137628 A137629 A137630 * A137632 A137633 A137634

Keyword

nonn

Author

Gary W. Adamson, Jan 31 2008

Status

approved