Number of (2+1)X(n+1) arrays of permutations of 0..n*3+2 with each element having index change +-(.,.) 0,0 0,2 or 2,1.
A264196
Number of (2+1)X(n+1) arrays of permutations of 0..n*3+2 with each element having index change +-(.,.) 0,0 0,2 or 2,1.
Terms
- a(0) =2a(1) =18a(2) =180a(3) =864a(4) =4608a(5) =29040a(6) =184525a(7) =1089000a(8) =6480000a(9) =39335400a(10) =238918849a(11) =1439151168a(12) =8674025472a(13) =52415185536a(14) =316746710820
External references
- oeis: A264196