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), (-1, 0, 1), (1, -1, 1), (1, 0, -1), (1, 1, 1)}.
A149797
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), (-1, 0, 1), (1, -1, 1), (1, 0, -1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =1a(2) =5a(3) =19a(4) =87a(5) =355a(6) =1671a(7) =7323a(8) =34973a(9) =158775a(10) =764755a(11) =3547363a(12) =17182145a(13) =80837595a(14) =393165213a(15) =1868497093a(16) =9116105897a(17) =43648911963a(18) =213476472531
External references
- oeis: A149797