Number of n X n 0..4 arrays with no element equal to another within two positions in the same row or column, and new values 0..4 introduced in row major order.
A206352
Number of n X n 0..4 arrays with no element equal to another within two positions in the same row or column, and new values 0..4 introduced in row major order.
Terms
- a(0) =1a(1) =4a(2) =230a(3) =91518a(4) =137375464a(5) =780158903978
External references
- oeis: A206352