|
| |
|
|
A037185
|
|
Number of ways of placing 2n points on n X n grid so no 3 are in a line (solutions with no symmetry).
|
|
1
| |
|
|
0, 0, 0, 0, 3, 4, 11, 40, 41, 132, 122, 524, 407, 1284, 3681, 5683, 6800, 18853
(list; graph; refs; listen; history; internal format)
|
|
|
|
OFFSET
| 1,5
|
|
|
REFERENCES
| A. Flammenkamp, Progress in the no-three-in-line problem, J. Combinat. Theory A 60 (1992), 305-311.
A. Flammenkamp, Progress in the no-three-in-line problem. II. J. Combin. Theory Ser. A 81 (1998), no. 1, 108-113.
|
|
|
LINKS
| Benjamin Chaffin, No-Three-In-Line Problem.
A. Flammenkamp, Solutions of the no-three-in-line problem
A. Flammenkamp, Solutions of the no-three-in-line problem
|
|
|
CROSSREFS
| Cf. A000769, A000755.
Sequence in context: A119042 A042273 A179167 * A101982 A041947 A201970
Adjacent sequences: A037182 A037183 A037184 * A037186 A037187 A037188
|
|
|
KEYWORD
| nonn
|
|
|
AUTHOR
| N. J. A. Sloane (njas(AT)research.att.com).
|
|
|
EXTENSIONS
| a(17) and a(18) from Benjamin Chaffin (chaffin(AT)gmail.com), Apr 05 2006
|
| |
|
|
