Equals one maps: number of nX3 binary arrays indicating the locations of corresponding elements equal to exactly one of their horizontal, vertical and antidiagonal neighbors in a random 0..3 nX3 array.
A221021
Equals one maps: number of nX3 binary arrays indicating the locations of corresponding elements equal to exactly one of their horizontal, vertical and antidiagonal neighbors in a random 0..3 nX3 array.
Terms
- a(0) =4a(1) =38a(2) =371a(3) =3474a(4) =30167a(5) =251674a(6) =2055232a(7) =16609480a(8) =133546783a(9) =1071058030a(10) =8579199454a(11) =68676536212a(12) =549584051869
External references
- oeis: A221021