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), (-1, 0, 1), (0, 0, 1), (0, 1, -1), (1, 0, 0)}.
A150098
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), (-1, 0, 1), (0, 0, 1), (0, 1, -1), (1, 0, 0)}.
Terms
- a(0) =1a(1) =2a(2) =6a(3) =19a(4) =67a(5) =249a(6) =964a(7) =3850a(8) =15727a(9) =65470a(10) =276659a(11) =1183644a(12) =5117229a(13) =22318698a(14) =98081642a(15) =433863665a(16) =1930189533a(17) =8630458362a(18) =38761928782a(19) =174784980244a(20) =790957057597
External references
- oeis: A150098