Number of nX3 0..2 arrays with values 0..2 introduced in row major order, the number of instances of each value within one of each other, and every element equal to two or fewer horizontal or vertical neighbors.
A199096
Number of nX3 0..2 arrays with values 0..2 introduced in row major order, the number of instances of each value within one of each other, and every element equal to two or fewer horizontal or vertical neighbors.
Terms
- a(0) =1a(1) =15a(2) =280a(3) =5295a(4) =101460a(5) =1999365a(6) =40210161a(7) =820951127a(8) =16962540224a(9) =353916457700
External references
- oeis: A199096