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, -1, 1), (-1, 0, 0), (1, -1, -1), (1, 1, 0)}.
A149085
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, -1, 1), (-1, 0, 0), (1, -1, -1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =7a(4) =30a(5) =69a(6) =293a(7) =809a(8) =3382a(9) =10439a(10) =43701a(11) =143573a(12) =607068a(13) =2074221a(14) =8852116a(15) =31177563a(16) =133899322a(17) =483528703a(18) =2086264777a(19) =7687404457a(20) =33298955306a(21) =124729199423a(22) =542093742204
External references
- oeis: A149085