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, 0, 1), (0, 1, 1), (1, 0, -1)}.
A150117
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, 0, 1), (0, 1, 1), (1, 0, -1)}.
Terms
- a(0) =1a(1) =2a(2) =6a(3) =19a(4) =71a(5) =266a(6) =1067a(7) =4305a(8) =18014a(9) =75777a(10) =325681a(11) =1406093a(12) =6155189a(13) =27052449a(14) =120016165a(15) =534302674a(16) =2394568143a(17) =10764279292a(18) =48627361446a(19) =220252330255
External references
- oeis: A150117