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), (1, -1, -1), (1, 1, 0)}.
A150426
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), (1, -1, -1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =2a(2) =7a(3) =24a(4) =97a(5) =390a(6) =1668a(7) =7196a(8) =31867a(9) =142529a(10) =646589a(11) =2956045a(12) =13635663a(13) =63282220a(14) =295455178a(15) =1386058114a(16) =6530966051a(17) =30887833937a(18) =146579346293a(19) =697658231680
External references
- oeis: A150426