OFFSET
1,8
COMMENTS
FORMULA
R(m,n)=floor(mn/3).
EXAMPLE
Northwest corner:
0 0 1 1 1 2
0 1 2 2 3 4
1 2 3 4 5 6
1 2 4 5 6 8
1 3 5 6 8 10
R(3,4) counts these marked squares: (1,3), (2,2), (3,1), (3,4).
CROSSREFS
KEYWORD
nonn,tabl
AUTHOR
Clark Kimberling, Sep 06 2008
STATUS
approved