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), (-1, 1, 0), (0, 1, -1), (1, 0, 1)}.
A148935
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), (-1, 1, 0), (0, 1, -1), (1, 0, 1)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =9a(4) =28a(5) =102a(6) =361a(7) =1335a(8) =5190a(9) =19890a(10) =77799a(11) =312792a(12) =1250660a(13) =5037901a(14) =20652153a(15) =84645208a(16) =347614744a(17) =1443123034a(18) =6006612898a(19) =25010222829a(20) =104795484413a(21) =440630256535
External references
- oeis: A148935