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, 0, 0), (0, -1, 1), (0, 0, 1), (0, 1, -1), (1, 0, 0)}.
A150102
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, 0, 0), (0, -1, 1), (0, 0, 1), (0, 1, -1), (1, 0, 0)}.
Terms
- a(0) =1a(1) =2a(2) =6a(3) =19a(4) =68a(5) =253a(6) =999a(7) =4031a(8) =16832a(9) =71234a(10) =308196a(11) =1345995a(12) =5968751a(13) =26654817a(14) =120354765a(15) =546416902a(16) =2501408653a(17) =11501092852a(18) =53220182665a(19) =247147799936
External references
- oeis: A150102