Number of (4+1) X (n+1) arrays of permutations of 0..n*5+4 with each element having directed index change 2,-1 1,0 2,1 0,-1 -2,-2 or -1,0.
A264492
Number of (4+1) X (n+1) arrays of permutations of 0..n*5+4 with each element having directed index change 2,-1 1,0 2,1 0,-1 -2,-2 or -1,0.
Terms
- a(0) =12a(1) =16a(2) =212a(3) =788a(4) =4772a(5) =23076a(6) =122628a(7) =626276a(8) =3250500a(9) =16761124a(10) =86652932a(11) =447525860a(12) =2312212676a(13) =11944531620a(14) =61707373956a(15) =318782647652
External references
- oeis: A264492