Number of (1+1) X (n+1) 0..2 arrays with every element next to itself plus and minus one within the range 0..2 horizontally, diagonally or antidiagonally, with no adjacent elements equal.
A232516
Number of (1+1) X (n+1) 0..2 arrays with every element next to itself plus and minus one within the range 0..2 horizontally, diagonally or antidiagonally, with no adjacent elements equal.
Terms
- a(0) =4a(1) =16a(2) =16a(3) =54a(4) =74a(5) =218a(6) =340a(7) =868a(8) =1494a(9) =3528a(10) =6466a(11) =14494a(12) =27650a(13) =59992a(14) =117432a(15) =249546a(16) =496576a(17) =1041354a(18) =2094122a(19) =4354594a(20) =8815964a(21) =18233764a(22) =37073438a(23) =76414688a(24) =155795194a(25) =320416958a(26) =654414674a(27) =1344022320a(28) =2748080744a(29) =5638905938
External references
- oeis: A232516