Number of (n+1)X(2+1) arrays of permutations of 0..n*3+2 with each element having index change (+-,+-) 0,2 1,1 or 1,0.
A263969
Number of (n+1)X(2+1) arrays of permutations of 0..n*3+2 with each element having index change (+-,+-) 0,2 1,1 or 1,0.
Terms
- a(0) =20a(1) =72a(2) =1441a(3) =13856a(4) =189993a(5) =2215960a(6) =28027420a(7) =340646784a(8) =4224499865a(9) =51860834624a(10) =639939698625
External references
- oeis: A263969