OFFSET
1,2
COMMENTS
r(n,k) is the position of the k-th occurrence of n in A249727. Every positive integer occurs exactly once, and each row is interspersed by each other row, except for initial terms.
EXAMPLE
Northwest corner:
1 2 4 6 9 12 16 20
3 5 7 10 13 17 21 25
8 11 14 18 22 26 30 35
15 19 23 27 31 36 41 47
32 37 42 48 54 60 66 73
43 49 55 61 67 74 81 89
MATHEMATICA
CROSSREFS
KEYWORD
AUTHOR
Clark Kimberling, May 14 2016
STATUS
approved