Number of n X 2 0..1 arrays with no 1 equal to more than three of its horizontal, vertical and antidiagonal neighbors.
A283409
Number of n X 2 0..1 arrays with no 1 equal to more than three of its horizontal, vertical and antidiagonal neighbors.
Terms
- a(0) =4a(1) =16a(2) =61a(3) =236a(4) =912a(5) =3525a(6) =13624a(7) =52656a(8) =203513a(9) =786568a(10) =3040048a(11) =11749641a(12) =45411804a(13) =175514464a(14) =678355061a(15) =2621810068a(16) =10133171296a(17) =39164225421a(18) =151367869744a(19) =585029621920
External references
- oeis: A283409