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, 1), (-1, 0, 0), (0, 1, 1), (1, -1, 1), (1, 1, -1)}.
A149054
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, 1), (-1, 0, 0), (0, 1, 1), (1, -1, 1), (1, 1, -1)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =10a(4) =40a(5) =155a(6) =660a(7) =2794a(8) =12298a(9) =54508a(10) =246019a(11) =1118974a(12) =5142467a(13) =23787738a(14) =110771042a(15) =518450180a(16) =2438101647a(17) =11510929374a(18) =54541727014a(19) =259238260109
External references
- oeis: A149054