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, diagonally or antidiagonally, with no adjacent elements equal.
A232509
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, diagonally or antidiagonally, with no adjacent elements equal.
Terms
- a(0) =16a(1) =52a(2) =200a(3) =784a(4) =3052a(5) =11900a(6) =46432a(7) =181184a(8) =707044a(9) =2759212a(10) =10767816a(11) =42021520a(12) =163989692a(13) =639972924a(14) =2497507216a(15) =9746573088a(16) =38036202612a(17) =148437067820a(18) =579278732344
External references
- oeis: A232509