Number of (n+1)X(3+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.
A232510
Number of (n+1)X(3+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) =32a(2) =128a(3) =400a(4) =1344a(5) =4416a(6) =14608a(7) =48224a(8) =159296a(9) =526096a(10) =1737600a(11) =5738880a(12) =18954256a(13) =62601632a(14) =206759168a(15) =682879120a(16) =2255396544a(17) =7449068736a(18) =24602602768a(19) =81256877024a(20) =268373233856a(21) =886376578576
External references
- oeis: A232510