Number of nX4 0..3 arrays with no element equal to one or three horizontal or vertical neighbors, with new values 0..3 introduced in row major order.
A240639
Number of nX4 0..3 arrays with no element equal to one or three horizontal or vertical neighbors, with new values 0..3 introduced in row major order.
Terms
- a(0) =5a(1) =193a(2) =7993a(3) =333308a(4) =13897353a(5) =579476701a(6) =24162243789
External references
- oeis: A240639