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, -1), (0, 1, 1), (1, -1, 0), (1, 0, 0)}.
A150016
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, -1), (0, 1, 1), (1, -1, 0), (1, 0, 0)}.
Terms
- a(0) =1a(1) =2a(2) =5a(3) =18a(4) =66a(5) =244a(6) =969a(7) =3882a(8) =15884a(9) =66549a(10) =279371a(11) =1192017a(12) =5139781a(13) =22231883a(14) =97151958a(15) =426603705a(16) =1881495031a(17) =8351057769a(18) =37165328425a(19) =166110559004a(20) =745346186757
External references
- oeis: A150016