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, 1, 1), (0, 0, -1), (1, 0, 0), (1, 1, 1)}.
A150817
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, 1, 1), (0, 0, -1), (1, 0, 0), (1, 1, 1)}.
Terms
- a(0) =1a(1) =2a(2) =8a(3) =31a(4) =136a(5) =595a(6) =2708a(7) =12422a(8) =57944a(9) =272047a(10) =1287966a(11) =6127908a(12) =29305248a(13) =140661334a(14) =677464577a(15) =3271799317a(16) =15840128961a(17) =76849014880a(18) =373533453669
External references
- oeis: A150817