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, 0, 0), (0, 1, 1), (1, -1, 0), (1, 1, -1), (1, 1, 1)}.
A151011
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, 0, 0), (0, 1, 1), (1, -1, 0), (1, 1, -1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =2a(2) =9a(3) =39a(4) =179a(5) =838a(6) =4001a(7) =19297a(8) =93811a(9) =458470a(10) =2250074a(11) =11078274a(12) =54681991a(13) =270441626a(14) =1339657025a(15) =6644734835a(16) =32993447151a(17) =163970009088a(18) =815501935265
External references
- oeis: A151011