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), (0, 0, 1), (0, 1, 0), (1, -1, -1)}.
A149829
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), (0, 0, 1), (0, 1, 0), (1, -1, -1)}.
Terms
- a(0) =1a(1) =2a(2) =4a(3) =10a(4) =28a(5) =85a(6) =282a(7) =961a(8) =3318a(9) =11898a(10) =43775a(11) =162823a(12) =615739a(13) =2363851a(14) =9162026a(15) =35894678a(16) =142000955a(17) =565585483a(18) =2269197889a(19) =9169579996a(20) =37251646814a(21) =152117235264a(22) =624441123868
External references
- oeis: A149829