Number of (n+1) X (4+1) arrays of permutations of 0..n*5+4 with each element having directed index change 1,0 1,1 0,-1 or -1,1.
A264565
Number of (n+1) X (4+1) arrays of permutations of 0..n*5+4 with each element having directed index change 1,0 1,1 0,-1 or -1,1.
Terms
- a(0) =2a(1) =8a(2) =44a(3) =192a(4) =888a(5) =4104a(6) =18540a(7) =85752a(8) =389340a(9) =1787832a(10) =8158644a(11) =37336464a(12) =170669592a(13) =780379920a(14) =3568245048a(15) =16314092712a(16) =74594729628a(17) =341056001520
External references
- oeis: A264565