OFFSET
1,3
EXAMPLE
The first 6 rows of A143589 are 1; 2; 1,1; 2,1; 1,1,2; 2,1,2,2. The
respective numbers of 1's are 1,0,2,1,2,1.
CROSSREFS
KEYWORD
nonn
AUTHOR
Clark Kimberling, Aug 25 2008
STATUS
approved