A110425 - OEIS

A110425

The r-th term of the n-th row of the following array contains the sum of r successively decreasing integers beginning from n. 0<r<=n. e.g. the row corresponding to 4 contains 4, (3+2),{(1) +(0)+(-1)}, {(-2)+(-3)+(-4)+(-5)} ----> 4,5,0,-14 1 2 1 3 3 -3 4 5 0 -14 5 7 3 -10 -35 6 9 6 -6 -30 -69 ... Sequence contains the array by rows.

1, 2, 1, 3, 3, -3, 4, 5, 0, -14, 5, 7, 3, -10, -35, 6, 9, 6, -6, -30, -69, 7, 11, 9, -2, -25, -63, -119, 8, 13, 12, 2, -20, -57, -112, -188, 9, 15, 15, 6, -15, -51, -105, -180, -279, 10, 17, 18, 10, -10, -45, -98, -172, -270, -395, 11, 19, 21, 14, -5, -39, -91, -164, -261, -385, -539, 12, 21, 24, 18, 0, -33, -84, -156, -252

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OFFSET

1,2

LINKS

Table of n, a(n) for n=1..75.

EXAMPLE

The r-th term of the n-th row of the following array contains the sum of r successively decreasing integers beginning from n. 0<r<=n.

e.g. the row corresponding to 4 contains

4, (3+2),{(1) +(0)+(-1)}, {(-2)+(-3)+(-4)+(-5)} ----> 4,5,0,-14

2 1

3 3 -3

4 5 0 -14