A166373 Triangle read by rows for floor(j^2 / n) with n >= 2 and 1<=j

0, 0, 1, 0, 1, 2, 0, 0, 1, 3, 0, 0, 1, 2, 4, 0, 0, 1, 2, 3, 5, 0, 0, 1, 2, 3, 4, 6, 0, 0, 1, 1, 2, 4, 5, 7, 0, 0, 0, 1, 2, 3, 4, 6, 8, 0, 0, 0, 1, 2, 3, 4, 5, 7, 9, 0, 0, 0, 1, 2, 3, 4, 5, 6, 8, 10, 0, 0, 0, 1, 1, 2, 3, 4, 6, 7, 9, 11, 0, 0, 0, 1, 1, 2, 3, 4, 5, 7, 8, 10, 12, 0, 0, 0, 1, 1, 2, 3, 4, 5, 6, 8, 9

Offset: 2

Author

Christopher Hunt Gribble, Oct 13 2009. Offset corrected Oct 18 2009

Keywords

• nonn
• easy
• tabl

Examples

			Part of the triangle from which the sequence is constructed is shown below.
.....j..1..2..3..4..5..6..7..8..9.10.11.12.13.14
...n
...2....0
...3....0..1
...4....0..1..2
...5....0..0..1..3
...6....0..0..1..2..4
...7....0..0..1..2..3..5
...8....0..0..1..2..3..4..6
...9....0..0..1..1..2..4..5..7
..10....0..0..0..1..2..3..4..6..8
..11....0..0..0..1..2..3..4..5..7..9
..12....0..0..0..1..2..3..4..5..6..8.10
..13....0..0..0..1..1..2..3..4..6..7..9.11
..14....0..0..0..1..1..2..3..4..5..7..8.10.12
..15....0..0..0..1..1..2..3..4..5..6..8..9.11.13
		

Crossrefs

A165974 is contained in this sequence.

Cf. A166381 (column sums), A166375 (row sums).

Programs

PARI

T(n,j)=j^2\n \\ Charles R Greathouse IV, Jan 16 2012