OFFSET
1,2
COMMENTS
Row sums = A143127: (1, 5, 11, 23, 33, 57, 71, ...).
FORMULA
Conjecture: T(n,k) = Sum_{i=1..n} [i*k <= n]*i*k. - Mats Granvik, Feb 26 2021
EXAMPLE
First few rows of the triangle:
1;
3, 2;
6, 2, 3;
10, 6, 3, 4;
15, 6, 3, 4, 5;
21, 12, 9, 4, 5, 6;
28, 12, 9, 4, 5, 6, 7;
36, 20, 9, 12, 5, 6, 7, 8;
...
CROSSREFS
KEYWORD
nonn,tabl
AUTHOR
Gary W. Adamson, Aug 06 2008
EXTENSIONS
Duplicate a(11)-a(15) terms removed by Mats Granvik, Feb 26 2021
STATUS
approved