Number of (1+1)X(n+1) arrays of permutations of 0..n*2+1 with each element having index change (+-,+-) 0,0 0,1 0,2 or 1,0.
A263817
Number of (1+1)X(n+1) arrays of permutations of 0..n*2+1 with each element having index change (+-,+-) 0,0 0,1 0,2 or 1,0.
Terms
- a(0) =9a(1) =82a(2) =572a(3) =3682a(4) =25001a(5) =170946a(6) =1157993a(7) =7844192a(8) =53217648a(9) =360982800a(10) =2448043433a(11) =16602594594a(12) =112601971449a(13) =763678525370
External references
- oeis: A263817