A115980 Array read by rows distributing the values of A000712 (vertically) and A001519 (horizontally).

1, 2, 2, 3, 2, 4, 4, 3, 2, 4, 6, 5, 4, 6, 2, 4, 6, 8, 6, 3, 4, 4, 8, 9, 2, 4, 6, 8, 10, 7, 4, 12, 8, 4, 8, 12, 12, 2, 4, 6, 8, 10, 12, 8, 3, 6, 5, 4, 14, 21, 12, 4, 8, 12, 16, 15, 2, 4, 6, 8, 10, 12, 14, 9

Offset: 0

Author

Alford Arnold, Feb 11 2006

Keywords

• easy
• nonn
• tabf

Comments

A001906 records the partial sums of the column sequence A001519 and is also the row sum of A078812 and of A085643; sequences linking a(n) to compositions of n having k parts when there are q kinds of part q. - Alford Arnold, Apr 30 2006

Examples

			The array begins:
1
..2
....2
....3
......2
......4..3
......4
.........2
.........4..4..3
.........6..6..4
.........5
with column sums beginning 1 2 5 10 20 ...A000712 related to A000041
and sums over each template beginning 1 2 5 13 34 ...A001519 related to A000045
		

Crossrefs

Cf. A000041, A000045.

Cf. A001906, A078812, A085643.