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, 1, -1), (1, 0, 1), (1, 1, 0), (1, 1, 1)}.
A151230
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, 1, -1), (1, 0, 1), (1, 1, 0), (1, 1, 1)}.
Terms
- a(0) =1a(1) =3a(2) =13a(3) =59a(4) =276a(5) =1326a(6) =6430a(7) =31466a(8) =154803a(9) =764468a(10) =3786401a(11) =18790430a(12) =93402254a(13) =464815171a(14) =2315297901a(15) =11541079787a(16) =57561303467a(17) =287218778948
External references
- oeis: A151230