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), (0, 1, 1), (1, 0, 1), (1, 1, -1)}.
A150864
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), (0, 1, 1), (1, 0, 1), (1, 1, -1)}.
Terms
- a(0) =1a(1) =2a(2) =8a(3) =32a(4) =146a(5) =660a(6) =3118a(7) =14744a(8) =70996a(9) =342668a(10) =1668784a(11) =8143954a(12) =39943876a(13) =196236252a(14) =967030118a(15) =4771500058a(16) =23590317548a(17) =116747020448a(18) =578555898824
External references
- oeis: A150864