Number of nX4 0..2 arrays with every 0 next to a 1 and every 1 next to a 2 horizontally or antidiagonally, with no adjacent elements equal.
A232331
Number of nX4 0..2 arrays with every 0 next to a 1 and every 1 next to a 2 horizontally or antidiagonally, with no adjacent elements equal.
Terms
- a(0) =6a(1) =32a(2) =154a(3) =734a(4) =3472a(5) =16338a(6) =76630a(7) =358656a(8) =1676330a(9) =7828014a(10) =36533360a(11) =170436130a(12) =794923238a(13) =3706958560a(14) =17284778298a(15) =80589690622a(16) =375729468240
External references
- oeis: A232331