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, -1, 1), (1, 1, -1)}.
A149071
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, -1, 1), (1, 1, -1)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =11a(4) =43a(5) =179a(6) =781a(7) =3471a(8) =15739a(9) =72351a(10) =336339a(11) =1576405a(12) =7441991a(13) =35329593a(14) =168527517a(15) =807109851a(16) =3878669451a(17) =18694035843a(18) =90329979997a(19) =437448386643
External references
- oeis: A149071