Number of n X 2 0..1 arrays with no 1 equal to more than two of its horizontal, vertical and antidiagonal neighbors.
A283276
Number of n X 2 0..1 arrays with no 1 equal to more than two of its horizontal, vertical and antidiagonal neighbors.
Terms
- a(0) =4a(1) =15a(2) =50a(3) =176a(4) =614a(5) =2141a(6) =7472a(7) =26070a(8) =90964a(9) =317393a(10) =1107448a(11) =3864117a(12) =13482703a(13) =47043939a(14) =164146038a(15) =572739484a(16) =1998406551a(17) =6972853897a(18) =24329729820a(19) =84891460788a(20) =296203869417
External references
- oeis: A283276