Number of nX4 0..3 arrays with every 0 next to a 1, every 1 next to a 2 and every 2 next to a 3 horizontally, vertically or antidiagonally, and no adjacent values equal.
A232157
Number of nX4 0..3 arrays with every 0 next to a 1, every 1 next to a 2 and every 2 next to a 3 horizontally, vertically or antidiagonally, and no adjacent values equal.
Terms
- a(0) =8a(1) =218a(2) =1284a(3) =7770a(4) =46702a(5) =286770a(6) =1767266a(7) =10830650a(8) =66701686a(9) =410364610a(10) =2522566124a(11) =15524673872a(12) =95489164864a(13) =587352257166
External references
- oeis: A232157