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), (-1, 0, -1), (-1, 0, 0), (1, 0, 0), (1, 1, 1)}.
A150689
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), (-1, 0, -1), (-1, 0, 0), (1, 0, 0), (1, 1, 1)}.
Terms
- a(0) =1a(1) =2a(2) =8a(3) =26a(4) =118a(5) =438a(6) =2050a(7) =8092a(8) =38568a(9) =157972a(10) =761062a(11) =3194218a(12) =15499742a(13) =66199502a(14) =322882914a(15) =1397277054a(16) =6841226856a(17) =29910993328a(18) =146881135522a(19) =647514501516
External references
- oeis: A150689