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, 1), (-1, 1, 0), (1, 0, 0)}.
A148498
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, 1), (-1, 1, 0), (1, 0, 0)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =5a(4) =15a(5) =29a(6) =97a(7) =209a(8) =739a(9) =1697a(10) =6021a(11) =14299a(12) =52027a(13) =127633a(14) =473223a(15) =1189853a(16) =4416111a(17) =11271917a(18) =42295113a(19) =109669063a(20) =415390879a(21) =1091329437a(22) =4135009859a(23) =10957215225a(24) =41769771825a(25) =111723881139a(26) =428304396077
External references
- oeis: A148498