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), (0, 0, -1), (0, 1, 1), (1, 0, 1), (1, 1, -1)}.
A150729
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), (0, 0, -1), (0, 1, 1), (1, 0, 1), (1, 1, -1)}.
Terms
- a(0) =1a(1) =2a(2) =8a(3) =28a(4) =126a(5) =532a(6) =2402a(7) =10814a(8) =49820a(9) =231120a(10) =1084480a(11) =5112302a(12) =24256900a(13) =115558824a(14) =552915824a(15) =2654606230a(16) =12783718698a(17) =61715592848a(18) =298622111154
External references
- oeis: A150729