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), (0, 0, -1), (1, 0, 1), (1, 1, 1)}.
A150908
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), (0, 0, -1), (1, 0, 1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =2a(2) =9a(3) =31a(4) =143a(5) =592a(6) =2698a(7) =12137a(8) =55724a(9) =258672a(10) =1206963a(11) =5675883a(12) =26848465a(13) =127379555a(14) =607671354a(15) =2905444843a(16) =13938687704a(17) =67042101669a(18) =323124345956
External references
- oeis: A150908