Number of n X n 0..2 arrays with all horizontally or vertically connected equal values in a straight line, and new values 0..2 introduced in row major order.
A223380
Number of n X n 0..2 arrays with all horizontally or vertically connected equal values in a straight line, and new values 0..2 introduced in row major order.
Terms
- a(0) =1a(1) =9a(2) =777a(3) =329840a(4) =684434305
External references
- oeis: A223380