OFFSET
1,2
COMMENTS
As a sequence, this is a permutation of the natural numbers.
EXAMPLE
Northwest corner:
1 3 5 9 13
2 7 11 15 21
4 8 17 23 29
6 12 18 31 39
CROSSREFS
KEYWORD
nonn,tabl
AUTHOR
Clark Kimberling, Aug 05 2004
STATUS
approved