Number of (3+1)X(n+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.
A264477
Number of (3+1)X(n+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) =57a(5) =160a(6) =484a(7) =1449a(8) =4250a(9) =12736a(10) =37980a(11) =112684a(12) =335528a(13) =998929a(14) =2971856a(15) =8844112a(16) =26318889a(17) =78319204a(18) =233069764a(19) =693574740a(20) =2063954658a(21) =6142018600a(22) =18277651737a(23) =54391278960a(24) =161859683044a(25) =481668191001
External references
- oeis: A264477