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, 1, 1), (0, 0, -1), (0, 1, 1), (1, -1, 1)}.
A148862
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, 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) =4976a(9) =19390a(10) =77008a(11) =309316a(12) =1257052a(13) =5165194a(14) =21402313a(15) =89375482a(16) =375896936a(17) =1591242286a(18) =6772816718a(19) =28974715622a(20) =124551513840a(21) =537697465253
External references
- oeis: A148862