A127780 - OEIS

A127780

A127775 * A002260 as infinite lower triangular matrices.

1, 3, 6, 5, 10, 15, 7, 14, 21, 28, 9, 18, 27, 36, 45, 11, 22, 33, 44, 55, 66, 13, 26, 39, 52, 65, 78, 91, 15, 30, 45, 60, 75, 90, 105, 120

(list; table; graph; refs; listen; history; text; internal format)

OFFSET

1,2

COMMENTS

Odd number transform of A002260.

Row sums = A002414: (1, 9, 30, 70, 135, ...).

LINKS

EXAMPLE

First few rows of the triangle:

3, 6;

5, 10, 15;

7, 14, 21, 28;

9, 18, 27, 36, 45;

11, 22, 33, 44, 55, 66;

...

CROSSREFS

KEYWORD

nonn,tabl

AUTHOR

STATUS

approved