Number of ways of placing 4n points on 2n X 2n grid so no 3 are in a line (solutions with either 90-degree rotational symmetry or full symmetry).
A037189
Number of ways of placing 4n points on 2n X 2n grid so no 3 are in a line (solutions with either 90-degree rotational symmetry or full symmetry).
Terms
- a(0) =0a(1) =0a(2) =3a(3) =4a(4) =6a(5) =4a(6) =13a(7) =13a(8) =7a(9) =16a(10) =8a(11) =23a(12) =36a(13) =58a(14) =92a(15) =101a(16) =172a(17) =281a(18) =337a(19) =541a(20) =746
External references
- oeis: A037189