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, 0, 0), (0, 0, 1), (1, 1, -1), (1, 1, 1)}.
A150833
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, 0, 0), (0, 0, 1), (1, 1, -1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =2a(2) =8a(3) =32a(4) =136a(5) =594a(6) =2674a(7) =12192a(8) =56252a(9) =262166a(10) =1231614a(11) =5819164a(12) =27637200a(13) =131855458a(14) =631385426a(15) =3032777480a(16) =14608882116a(17) =70545450862a(18) =341384364454
External references
- oeis: A150833