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, 1, 1), (0, 1, -1), (1, 0, 0), (1, 0, 1)}.
A150522
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, 1, 1), (0, 1, -1), (1, 0, 0), (1, 0, 1)}.
Terms
- a(0) =1a(1) =2a(2) =7a(3) =25a(4) =103a(5) =438a(6) =1906a(7) =8534a(8) =38910a(9) =178973a(10) =831918a(11) =3903555a(12) =18424142a(13) =87390499a(14) =416636868a(15) =1994523916a(16) =9577325284a(17) =46124889133a(18) =222762556911
External references
- oeis: A150522