A049702 Array T read by diagonals; T(i,j)=number of directions determined by 2 lattice points in [ 0,i ]x[ 0,j ].

0, 1, 1, 1, 4, 1, 1, 6, 6, 1, 1, 8, 8, 8, 1, 1, 10, 12, 12, 10, 1, 1, 12, 14, 16, 14, 12, 1, 1, 14, 18, 20, 20, 18, 14, 1, 1, 16, 20, 26, 24, 26, 20, 16, 1, 1, 18, 24, 28, 32, 32, 28, 24, 18, 1, 1, 20, 26, 34, 34, 40, 34, 34, 26, 20, 1, 1, 22, 30, 38

Offset

0,5

Links

Table of n, a(n) for n=0..69.

Example

Diagonals (each starting on row 1): {0}; {1,1}; {1,4,1}; ...

Crossrefs

Sequence in context: A267990 A084061 A140262 * A159040 A132046 A141540

Adjacent sequences: A049699 A049700 A049701 * A049703 A049704 A049705

Keyword

nonn,tabl

Author

Clark Kimberling

Status

approved