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), (0, 0, 1), (0, 1, -1), (1, 0, 1)}.
A150034
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), (0, 0, 1), (0, 1, -1), (1, 0, 1)}.
Terms
- a(0) =1a(1) =2a(2) =6a(3) =17a(4) =57a(5) =189a(6) =668a(7) =2344a(8) =8533a(9) =30974a(10) =114791a(11) =425083a(12) =1595222a(13) =5987456a(14) =22670866a(15) =85903427a(16) =327487069a(17) =1249648855a(18) =4789354971a(19) =18374473131a(20) =70722563222a(21) =272488738875
External references
- oeis: A150034