Number of nX2 0..3 arrays with no element less than a strict majority of its horizontal, vertical, diagonal and antidiagonal neighbors.
A231581
Number of nX2 0..3 arrays with no element less than a strict majority of its horizontal, vertical, diagonal and antidiagonal neighbors.
Terms
- a(0) =4a(1) =28a(2) =124a(3) =602a(4) =2776a(5) =12922a(6) =60720a(7) =286047a(8) =1335296a(9) =6256326a(10) =29377828a(11) =137595239a(12) =644951590a(13) =3024402309a(14) =14175895645a(15) =66459189937a(16) =311583082104
External references
- oeis: A231581