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, 1, 0), (0, 1, -1), (1, 0, 0)}.
A148017
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, 1, 0), (0, 1, -1), (1, 0, 0)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =3a(4) =8a(5) =17a(6) =46a(7) =117a(8) =365a(9) =1038a(10) =3155a(11) =9720a(12) =31261a(13) =99782a(14) =322517a(15) =1078436a(16) =3639101a(17) =12237485a(18) =41922026a(19) =146103022a(20) =508439432a(21) =1781167516a(22) =6315381661a(23) =22553829270a(24) =80707216930a(25) =290156888459
External references
- oeis: A148017