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, 1, -1), (-1, 1, 1), (1, -1, -1), (1, 0, 1)}.
A148665
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, 1, -1), (-1, 1, 1), (1, -1, -1), (1, 0, 1)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =6a(4) =26a(5) =67a(6) =289a(7) =883a(8) =3919a(9) =12953a(10) =58609a(11) =205249a(12) =937906a(13) =3425450a(14) =15800931a(15) =59453632a(16) =276599331a(17) =1064951751a(18) =4989188382a(19) =19567761147a(20) =92210170076a(21) =367167735527
External references
- oeis: A148665