Number of walks within N^3 (the first octant of Z^3) starting at (0,0,0) and consisting of n steps taken from {(-1, -1, 1), (-1, 0, 1), (-1, 1, -1), (1, -1, 0), (1, 1, 0)}.
A149153
Number of walks within N^3 (the first octant of Z^3) starting at (0,0,0) and consisting of n steps taken from {(-1, -1, 1), (-1, 0, 1), (-1, 1, -1), (1, -1, 0), (1, 1, 0)}.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =9a(4) =38a(5) =120a(6) =514a(7) =1787a(8) =8042a(9) =30024a(10) =137224a(11) =530796a(12) =2480856a(13) =9918516a(14) =46702784a(15) =190374471a(16) =906997854a(17) =3769136982a(18) =18033009962a(19) =75864970010a(20) =365546041018
External references
- oeis: A149153