Number of nX5 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 zero or two horizontal or vertical neighbors.
A199243
Number of nX5 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 zero or two horizontal or vertical neighbors.
Terms
- a(0) =6a(1) =36a(2) =110a(3) =2907a(4) =29227a(5) =106134a(6) =3190670a(7) =34188947a(8) =128653588a(9) =4104988637a(10) =45715625760a(11) =175247135865
External references
- oeis: A199243