OFFSET
2,2
LINKS
Lars Blomberg, Table of n, a(n) for n = 2..9997 (the first 703 rows)
EXAMPLE
Triangle begins:
1,
2,
2, 1,
3, 1, <- gaps in 3,5,7,11,13 are 2 (3 times), 4 (once)
3, 2,
4, 2,
4, 3,
4, 3, 1,
5, 3, 1,
5, 3, 2,
5, 4, 2,
6, 4, 2,
6, 5, 2,
6, 5, 3,
6, 5, 4,
7, 5, 4,
7, 5, 5,
7, 6, 5,
8, 6, 5,
...
CROSSREFS
KEYWORD
AUTHOR
N. J. A. Sloane, Nov 06 2016
STATUS
approved