A133737 A000012 * A130162.

1, 2, 1, 3, 1, 2, 4, 2, 2, 3, 5, 2, 2, 3, 6, 6, 3, 4, 3, 6, 7, 7, 3, 4, 3, 6, 7, 14, 8, 4, 4, 6, 6, 7, 14, 17, 9, 4, 6, 6, 6, 7, 14, 17, 27, 10, 5, 6, 6, 12, 7, 14, 17, 27, 34

Offset

1,2

Comments

Row sums = A026905, partial sums of A000041, the partition numbers with offset 1, = (1, 3, 6, 11, 18, 29, 44, 66, ...).

Links

Table of n, a(n) for n=1..55.

Formula

A000012 * A130162 as infinite lower triangular matrices.

Example

First few rows of the triangle:
  1;
  2, 1;
  3, 1, 2;
  4, 2, 2, 3;
  5, 2, 2, 3, 6;
  6, 3, 4, 3, 6, 7;
  7, 3, 4, 3, 6, 7, 14;
  ...

Crossrefs

Cf. A130162, A026905, A000041.

Sequence in context: A130517 A316715 A130212 * A213361 A212121 A213371

Adjacent sequences: A133734 A133735 A133736 * A133738 A133739 A133740

Keyword

nonn,tabl

Author

Gary W. Adamson, Sep 22 2007

Status

approved