Number of 2nX4 0..2 arrays with values 0..2 introduced in row major order and each element unequal to exactly two horizontal and vertical neighbors.
A198448
Number of 2nX4 0..2 arrays with values 0..2 introduced in row major order and each element unequal to exactly two horizontal and vertical neighbors.
Terms
- a(0) =13a(1) =177a(2) =1399a(3) =14109a(4) =146187a(5) =1532249a(6) =16411255a(7) =176845253a(8) =1916108803a(9) =20825391089a(10) =226732488271
External references
- oeis: A198448