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), (0, -1, 1), (1, 1, -1), (1, 1, 0)}.
A148943
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), (0, -1, 1), (1, 1, -1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =9a(4) =29a(5) =103a(6) =367a(7) =1337a(8) =5023a(9) =18933a(10) =72019a(11) =277595a(12) =1072317a(13) =4161419a(14) =16257277a(15) =63604357a(16) =249494725a(17) =982307399a(18) =3871371275a(19) =15281854703a(20) =60457884995a(21) =239348796175a(22) =948543450125
External references
- oeis: A148943