Number of (n+1)X(2+1) 0..2 arrays with every element next to itself plus and minus one within the range 0..2 horizontally or antidiagonally, with no adjacent elements equal.
A232583
Number of (n+1)X(2+1) 0..2 arrays with every element next to itself plus and minus one within the range 0..2 horizontally or antidiagonally, with no adjacent elements equal.
Terms
- a(0) =10a(1) =34a(2) =124a(3) =456a(4) =1686a(5) =6232a(6) =23034a(7) =85130a(8) =314626a(9) =1162804a(10) =4297528a(11) =15882942a(12) =58700688a(13) =216947890a(14) =801802986a(15) =2963329250a(16) =10951967500a(17) =40476633544a(18) =149594843398a(19) =552877431048
External references
- oeis: A232583