Number of (n+1)X(3+1) arrays of permutations of 0..n*4+3 with each element having directed index change 1,0 0,-1 1,2 or -1,1.
A264578
Number of (n+1)X(3+1) arrays of permutations of 0..n*4+3 with each element having directed index change 1,0 0,-1 1,2 or -1,1.
Terms
- a(0) =0a(1) =4a(2) =4a(3) =6a(4) =25a(5) =68a(6) =112a(7) =281a(8) =856a(9) =1674a(10) =3988a(11) =10508a(12) =23724a(13) =55897a(14) =136144a(15) =325584a(16) =765361a(17) =1829400a(18) =4401652a(19) =10407276a(20) =24816024a(21) =59395330a(22) =141247593a(23) =336608388a(24) =803177056a(25) =1914674361a(26) =4562063424a(27) =10876904302a(28) =25937972164a(29) =61813285608
External references
- oeis: A264578