login
A194190
Number of ways to arrange 5 indistinguishable points on an n X n square grid so that no three points are collinear at any angle.
4
0, 0, 28, 1668, 25052, 215448, 1189868, 5199888, 18520572, 56978440, 155627304, 388897892, 894254904, 1932504496, 3945470564, 7669533756, 14291010972, 25694009628, 44662697948, 75451394832, 124066723008, 199190308172
OFFSET
1,3
COMMENTS
Column 5 of A194193.
LINKS
EXAMPLE
Some solutions for 3 X 3:
..0..1..0....1..0..1....0..1..1....1..1..0....1..1..0....1..1..0....1..0..1
..0..1..1....1..1..0....1..0..0....1..0..1....1..0..0....0..0..1....1..0..0
..1..0..1....0..1..0....0..1..1....0..0..1....0..1..1....1..1..0....0..1..1
CROSSREFS
Sequence in context: A335370 A335368 A339120 * A190397 A004705 A182400
KEYWORD
nonn
AUTHOR
R. H. Hardin, Aug 18 2011
STATUS
approved