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), (1, -1, -1), (1, 0, -1), (1, 1, 1)}.
A149594
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), (1, -1, -1), (1, 0, -1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =1a(2) =5a(3) =15a(4) =59a(5) =219a(6) =921a(7) =3645a(8) =15577a(9) =64339a(10) =280699a(11) =1190139a(12) =5237395a(13) =22621313a(14) =100613547a(15) =440444631a(16) =1970212053a(17) =8714144825a(18) =39234678923a(19) =174950750695a(20) =790927342669
External references
- oeis: A149594