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, 1), (-1, 1, 0), (0, -1, 1), (1, 0, -1), (1, 1, 0)}.
A149453
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, 1), (-1, 1, 0), (0, -1, 1), (1, 0, -1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =13a(4) =49a(5) =197a(6) =812a(7) =3474a(8) =15158a(9) =67376a(10) =303459a(11) =1383358a(12) =6363572a(13) =29509269a(14) =137771543a(15) =646907907a(16) =3052952032a(17) =14470721920a(18) =68854163470a(19) =328735177885
External references
- oeis: A149453