Number of (n+1)X(3+1) arrays of permutations of 0..n*4+3 with each element having directed index change 0,1 1,0 2,1 or -1,-1.
A264471
Number of (n+1)X(3+1) arrays of permutations of 0..n*4+3 with each element having directed index change 0,1 1,0 2,1 or -1,-1.
Terms
- a(0) =0a(1) =4a(2) =6a(3) =16a(4) =49a(5) =124a(6) =384a(7) =1041a(8) =2868a(9) =8189a(10) =22760a(11) =63910a(12) =179095a(13) =500979a(14) =1405340a(15) =3935526a(16) =11024880a(17) =30892270a(18) =86537090a(19) =242454683a(20) =679254490a(21) =1902958308a(22) =5331384633a(23) =14936238820a(24) =41845207329a(25) =117233159460a(26) =328438385380
External references
- oeis: A264471