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, 0), (0, 1, 0), (0, 1, 1), (1, 0, 0), (1, 0, 1)}.
A151245
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, 0), (0, 1, 0), (0, 1, 1), (1, 0, 0), (1, 0, 1)}.
Terms
- a(0) =1a(1) =4a(2) =16a(3) =72a(4) =336a(5) =1568a(6) =7488a(7) =36160a(8) =174720a(9) =851456a(10) =4169728a(11) =20430848a(12) =100515840a(13) =495792128a(14) =2446532608a(15) =12099710976a(16) =59931222016a(17) =296944959488
External references
- oeis: A151245