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, 1, 0), (0, 1, -1), (1, 0, 1), (1, 1, 0)}.
A150774
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, 1, 0), (0, 1, -1), (1, 0, 1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =2a(2) =8a(3) =30a(4) =129a(5) =560a(6) =2519a(7) =11486a(8) =53195a(9) =248410a(10) =1170519a(11) =5547012a(12) =26430472a(13) =126464825a(14) =607337619a(15) =2925618904a(16) =14131096096a(17) =68412200083a(18) =331879233862
External references
- oeis: A150774