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, 0), (0, 1, 1), (1, 0, -1), (1, 0, 1)}.
A150600
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, 0), (0, 1, 1), (1, 0, -1), (1, 0, 1)}.
Terms
- a(0) =1a(1) =2a(2) =7a(3) =27a(4) =109a(5) =462a(6) =2021a(7) =8957a(8) =40478a(9) =184607a(10) =850670a(11) =3949965a(12) =18446391a(13) =86653625a(14) =408802335a(15) =1936326814a(16) =9203631648a(17) =43874127953a(18) =209728998818
External references
- oeis: A150600