Number of (n+1)X(2+1) 0..3 arrays with every element next to itself plus and minus one within the range 0..3 horizontally, vertically or antidiagonally, with no adjacent elements equal.
A232385
Number of (n+1)X(2+1) 0..3 arrays with every element next to itself plus and minus one within the range 0..3 horizontally, vertically or antidiagonally, with no adjacent elements equal.
Terms
- a(0) =18a(1) =64a(2) =192a(3) =840a(4) =3246a(5) =12818a(6) =51240a(7) =203104a(8) =809436a(9) =3222418a(10) =12842530a(11) =51200418a(12) =204173560a(13) =814433476a(14) =3249025434a(15) =12962845362a(16) =51721055986a(17) =206371682824a(18) =823458800224
External references
- oeis: A232385