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, 1, 0), (1, 0, 0), (1, 1, 0), (1, 1, 1)}.
A151252
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, 1, 0), (1, 0, 0), (1, 1, 0), (1, 1, 1)}.
Terms
- a(0) =1a(1) =4a(2) =18a(3) =86a(4) =414a(5) =2026a(6) =9962a(7) =49220a(8) =243940a(9) =1211298a(10) =6024982a(11) =29999388a(12) =149506288a(13) =745566590a(14) =3719918958a(15) =18567624442a(16) =92707299566a(17) =463001495966
External references
- oeis: A151252