Number of nX2 0..7 arrays with values 0..7 introduced in row major order and each element equal to at least one horizontal or vertical neighbor.
A198656
Number of nX2 0..7 arrays with values 0..7 introduced in row major order and each element equal to at least one horizontal or vertical neighbor.
Terms
- a(0) =1a(1) =3a(2) =14a(3) =76a(4) =488a(5) =3521a(6) =28030a(7) =242883a(8) =2267306a(9) =22621072a(10) =239604079a(11) =2677734762a(12) =31381450817a(13) =383270472363
External references
- oeis: A198656