OFFSET
0,3
LINKS
Alois P. Heinz, Rows n = 0..18, flattened
Wikipedia, Arithmetic progression
EXAMPLE
Triangle T(n,k) begins:
1;
1;
2;
4, 2;
18, 4, 2;
80, 34, 4, 2;
482, 196, 36, 4, 2;
3280, 1418, 292, 44, 4, 2;
26244, 11292, 2426, 304, 48, 4, 2;
231148, 106132, 22156, 3010, 372, 56, 4, 2;
2320130, 1046176, 225804, 32308, 3892, 424, 60, 4, 2;
...
CROSSREFS
KEYWORD
nonn,tabf
AUTHOR
Alois P. Heinz, Nov 21 2017
STATUS
approved