Number of (2+1)X(n+1) arrays of permutations of 0..n*3+2 with each element having index change (+-,+-) 0,0 1,1 or 1,2.
A263966
Number of (2+1)X(n+1) arrays of permutations of 0..n*3+2 with each element having index change (+-,+-) 0,0 1,1 or 1,2.
Terms
- a(0) =9a(1) =141a(2) =2089a(3) =23841a(4) =283641a(5) =3408145a(6) =40723017a(7) =484847873a(8) =5770449785a(9) =68675639729a(10) =817318275497
External references
- oeis: A263966