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, 0, 1), (0, 1, -1), (1, -1, 1), (1, 0, 0), (1, 1, 0)}.
A150580
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, 0, 1), (0, 1, -1), (1, -1, 1), (1, 0, 0), (1, 1, 0)}.
Terms
- a(0) =1a(1) =2a(2) =7a(3) =26a(4) =109a(5) =473a(6) =2129a(7) =9781a(8) =45693a(9) =215988a(10) =1030642a(11) =4953855a(12) =23950353a(13) =116341574a(14) =567338652a(15) =2775523875a(16) =13614961348a(17) =66938282042a(18) =329739787878
External references
- oeis: A150580