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, 1, 0), (1, 0, 0), (1, 1, 1)}.
A151171
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, 1, 0), (1, 0, 0), (1, 1, 1)}.
Terms
- a(0) =1a(1) =3a(2) =12a(3) =49a(4) =213a(5) =949a(6) =4315a(7) =19948a(8) =93051a(9) =438391a(10) =2076618a(11) =9895800a(12) =47347875a(13) =227405295a(14) =1095653934a(15) =5292729849a(16) =25629887924a(17) =124354876370a(18) =604493596562
External references
- oeis: A151171