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), (-1, 0, 0), (-1, 1, 0), (1, 0, 0)}.
A148504
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), (-1, 0, 0), (-1, 1, 0), (1, 0, 0)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =5a(4) =17a(5) =34a(6) =121a(7) =265a(8) =997a(9) =2330a(10) =9161a(11) =22428a(12) =91109a(13) =230853a(14) =956887a(15) =2486209a(16) =10456869a(17) =27707670a(18) =118000345a(19) =317767912a(20) =1368722965a(21) =3736854701a(22) =16249643675a(23) =44881448060a(24) =196661563637a(25) =548519721819
External references
- oeis: A148504