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), (0, 1, 0), (1, 1, -1)}.
A148146
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), (0, 1, 0), (1, 1, -1)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =4a(4) =11a(5) =29a(6) =92a(7) =282a(8) =937a(9) =3139a(10) =10935a(11) =38567a(12) =139993a(13) =512016a(14) =1906146a(15) =7189104a(16) =27356563a(17) =105196897a(18) =408659119a(19) =1596945488a(20) =6291492797a(21) =24971494328a(22) =99570362528a(23) =399510927609
External references
- oeis: A148146