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, 1), (1, 0, 0), (1, 1, 1)}.
A150705
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, 1), (1, 0, 0), (1, 1, 1)}.
Terms
- a(0) =1a(1) =2a(2) =8a(3) =26a(4) =122a(5) =452a(6) =2172a(7) =8550a(8) =41818a(9) =170770a(10) =840998a(11) =3517218a(12) =17406890a(13) =74068058a(14) =367614808a(15) =1584603276a(16) =7880267372a(17) =34315247320a(18) =170883356226a(19) =750252702374
External references
- oeis: A150705