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, 0, -1), (1, 0, -1), (1, 0, 1)}.
A149087
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, 0, -1), (1, 0, -1), (1, 0, 1)}.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =7a(4) =30a(5) =75a(6) =293a(7) =897a(8) =3296a(9) =11493a(10) =41905a(11) =153503a(12) =570138a(13) =2136265a(14) =8128562a(15) =30938365a(16) =119262756a(17) =461558439a(18) =1797401295a(19) =7047184967a(20) =27701702878a(21) =109512364145a(22) =434806576518
External references
- oeis: A149087