Number of 2Xn 0..1 arrays with no 1 equal to more than three of its horizontal, diagonal and antidiagonal neighbors, with the exception of exactly two elements.
A284076
Number of 2Xn 0..1 arrays with no 1 equal to more than three of its horizontal, diagonal and antidiagonal neighbors, with the exception of exactly two elements.
Terms
- a(0) =0a(1) =0a(2) =1a(3) =6a(4) =33a(5) =176a(6) =858a(7) =4000a(8) =18298a(9) =82176a(10) =363027a(11) =1584090a(12) =6844659a(13) =29327056a(14) =124752876a(15) =527398452a(16) =2217568396a(17) =9279837664a(18) =38668567653a(19) =160517532910a(20) =664042452165
External references
- oeis: A284076