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), (0, 1, -1), (1, 0, 1), (1, 1, 1)}.
A150389
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), (0, 1, -1), (1, 0, 1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =2a(2) =7a(3) =24a(4) =86a(5) =324a(6) =1224a(7) =4667a(8) =18103a(9) =70228a(10) =273857a(11) =1074849a(12) =4222120a(13) =16626466a(14) =65686791a(15) =259694763a(16) =1028088033a(17) =4077689559a(18) =16181304904a(19) =64263458424a(20) =255518428334
External references
- oeis: A150389