Number of (n+1)X(3+1) arrays of permutations of 0..n*4+3 with each element having directed index change -1,1 0,-1 0,1 or 1,0.
A264501
Number of (n+1)X(3+1) arrays of permutations of 0..n*4+3 with each element having directed index change -1,1 0,-1 0,1 or 1,0.
Terms
- a(0) =3a(1) =14a(2) =46a(3) =149a(4) =524a(5) =1790a(6) =6084a(7) =20812a(8) =71127a(9) =242856a(10) =829559a(11) =2833848a(12) =9679612a(13) =33063445a(14) =112939275a(15) =385778601a(16) =1317744028a(17) =4501163516a(18) =15375113297a(19) =52518432516a(20) =179392903112a(21) =612771784386
External references
- oeis: A264501