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, 1, 1), (0, 0, -1), (0, 1, 1), (1, -1, 1)}.
A148863
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, 1, 1), (0, 0, -1), (0, 1, 1), (1, -1, 1)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =8a(4) =28a(5) =96a(6) =354a(7) =1304a(8) =5004a(9) =19418a(10) =77274a(11) =309904a(12) =1261752a(13) =5176378a(14) =21469264a(15) =89610936a(16) =377023216a(17) =1595082258a(18) =6790773066a(19) =29045980692a(20) =124859426292a(21) =538912154546
External references
- oeis: A148863