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

Author

Christian G. Bower, Feb 15 1999

Keywords

• nonn
• tabl

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

Examples

			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.