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), (0, 0, 1), (0, 1, -1), (1, 0, 0), (1, 1, -1)}.
A150115
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), (0, 0, 1), (0, 1, -1), (1, 0, 0), (1, 1, -1)}.
Terms
- a(0) =1a(1) =2a(2) =6a(3) =19a(4) =70a(5) =272a(6) =1102a(7) =4603a(8) =19689a(9) =85905a(10) =380419a(11) =1706952a(12) =7740063a(13) =35416953a(14) =163311951a(15) =758082996a(16) =3539424469a(17) =16609301242a(18) =78292331761a(19) =370522059204
External references
- oeis: A150115