Number of nX2 0..3 arrays with no element equal to exactly one horizontal or vertical neighbor, with new values 0..3 introduced in row major order.
A240770
Number of nX2 0..3 arrays with no element equal to exactly one horizontal or vertical neighbor, with new values 0..3 introduced in row major order.
Terms
- a(0) =1a(1) =5a(2) =28a(3) =196a(4) =1418a(5) =10314a(6) =75138a(7) =547557a(8) =3990640a(9) =29085026a(10) =211983034a(11) =1545021626a(12) =11260787296a(13) =82073558277a(14) =598188294684
External references
- oeis: A240770