Number of nX3 0..2 arrays with every 0 next to a 1 and every 1 next to a 2 horizontally, vertically or antidiagonally.
A232304
Number of nX3 0..2 arrays with every 0 next to a 1 and every 1 next to a 2 horizontally, vertically or antidiagonally.
Terms
- a(0) =7a(1) =257a(2) =5149a(3) =107047a(4) =2245709a(5) =46996227a(6) =983668985a(7) =20589521605a(8) =430963205159
External references
- oeis: A232304