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, 1), (0, 1, 1), (1, 0, -1), (1, 1, 1)}.
A150848
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, 1), (0, 1, 1), (1, 0, -1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =2a(2) =8a(3) =32a(4) =140a(5) =617a(6) =2833a(7) =13023a(8) =61051a(9) =286985a(10) =1362993a(11) =6490277a(12) =31095769a(13) =149316400a(14) =719881023a(15) =3477149010a(16) =16841970459a(17) =81704281033a(18) =397171081932
External references
- oeis: A150848