A038497 - OEIS

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

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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.