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, 0)}.
A148307
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, 0)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =5a(4) =14a(5) =37a(6) =111a(7) =365a(8) =1126a(9) =3763a(10) =12701a(11) =43975a(12) =152390a(13) =542045a(14) =1940880a(15) =7015549a(16) =25755124a(17) =94610231a(18) =352061771a(19) =1315135003a(20) =4958004914a(21) =18755194367a(22) =71374096312a(23) =272998723401
External references
- oeis: A148307