A038497 Matrix square of partition triangle A008284.

1, 2, 1, 3, 2, 1, 5, 5, 2, 1, 7, 8, 5, 2, 1, 11, 15, 10, 5, 2, 1, 15, 23, 18, 10, 5, 2, 1, 22, 38, 31, 20, 10, 5, 2, 1, 30, 56, 52, 34, 20, 10, 5, 2, 1, 42, 86, 83, 60, 36, 20, 10, 5, 2, 1, 56, 123, 129, 97, 63, 36, 20, 10, 5, 2, 1, 77, 181, 198, 158, 105, 65, 36, 20, 10, 5, 2, 1

Offset

1,2

Comments

Row sums form A022811 (number of terms in n-th derivative of a function composed with itself 3 times). - Paul D. Hanna, Jul 13 2004

Links

Table of n, a(n) for n=1..78.

Example

1; 2,1; 3,2,1; 5,5,2,1; ...

Crossrefs

Cf. A038498, A039800-A039809. a(n, 1) = A000041(n) (first column) (partition numbers).

Cf. A022811.

Sequence in context: A211980 A171730 A131243 * A091355 A131245 A179927

Adjacent sequences: A038494 A038495 A038496 * A038498 A038499 A038500

Keyword

nonn,tabl

Author

Christian G. Bower, Feb 15 1999

Status

approved