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, 0, 1), (-1, 1, 0), (1, 0, -1), (1, 0, 0)}.
A148630
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, 0, 1), (-1, 1, 0), (1, 0, -1), (1, 0, 0)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =6a(4) =22a(5) =55a(6) =217a(7) =621a(8) =2564a(9) =7962a(10) =33926a(11) =111547a(12) =485796a(13) =1666676a(14) =7378655a(15) =26155241a(16) =117286511a(17) =426714453a(18) =1933120528a(19) =7184478144a(20) =32820194908a(21) =124160079873a(22) =571147562420
External references
- oeis: A148630