Equals one maps: number of 2 X n binary arrays indicating the locations of corresponding elements equal to exactly one of their horizontal, diagonal and antidiagonal neighbors in a random 0..3 2 X n array.
A221633
Equals one maps: number of 2 X n binary arrays indicating the locations of corresponding elements equal to exactly one of their horizontal, diagonal and antidiagonal neighbors in a random 0..3 2 X n array.
Terms
- a(0) =1a(1) =8a(2) =37a(3) =176a(4) =787a(5) =3480a(6) =14865a(7) =62064a(8) =254463a(9) =1032248a(10) =4160093a(11) =16707056a(12) =66965547a(13) =268146328a(14) =1073157737a(15) =4293797168a(16) =17177516055a(17) =68714775736a(18) =274868469813
External references
- oeis: A221633