OFFSET
1,1
COMMENTS
As a sequence, this is a permutation of the natural numbers. Evens lie on or below the main diagonal; odds, above. The triangle formed by the evens is twice that of A066182.
EXAMPLE
Northwest corner:
2 1 3 7 13
6 4 5 9 15
12 8 10 11 17
20 14 16 18 19
CROSSREFS
KEYWORD
nonn,tabl
AUTHOR
Clark Kimberling, Aug 05 2004
STATUS
approved