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, 0, 1), (1, -1, 0), (1, 1, 0), (1, 1, 1)}.
A151231
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, 0, 1), (1, -1, 0), (1, 1, 0), (1, 1, 1)}.
Terms
- a(0) =1a(1) =3a(2) =13a(3) =59a(4) =277a(5) =1319a(6) =6361a(7) =30919a(8) =151161a(9) =741995a(10) =3653653a(11) =18034963a(12) =89197069a(13) =441836367a(14) =2191403681a(15) =10880204831a(16) =54066819569a(17) =268870611475
External references
- oeis: A151231