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), (0, 0, -1), (0, 1, 1), (1, 0, 1), (1, 1, -1)}.
A150732
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), (0, 0, -1), (0, 1, 1), (1, 0, 1), (1, 1, -1)}.
Terms
- a(0) =1a(1) =2a(2) =8a(3) =28a(4) =130a(5) =542a(6) =2584a(7) =11496a(8) =55678a(9) =256510a(10) =1254108a(11) =5903846a(12) =29033776a(13) =138631022a(14) =684430494a(15) =3300277738a(16) =16338765082a(17) =79346440476a(18) =393614695616
External references
- oeis: A150732