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), (-1, 0, 1), (1, 0, -1), (1, 1, 1)}.
A149643
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), (-1, 0, 1), (1, 0, -1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =1a(2) =5a(3) =15a(4) =71a(5) =243a(6) =1173a(7) =4425a(8) =21623a(9) =85595a(10) =420601a(11) =1718067a(12) =8475957a(13) =35414065a(14) =175191261a(15) =744299953a(16) =3688985463a(17) =15875795231a(18) =78795932287a(19) =342608596111
External references
- oeis: A149643