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, 1, 1), (0, 1, 1), (1, -1, 1), (1, 1, -1)}.
A149059
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, 1, 1), (0, 1, 1), (1, -1, 1), (1, 1, -1)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =10a(4) =42a(5) =162a(6) =730a(7) =3082a(8) =14290a(9) =63336a(10) =298514a(11) =1361600a(12) =6486758a(13) =30142468a(14) =144686738a(15) =681021198a(16) =3287160352a(17) =15617444040a(18) =75703276070a(19) =362216229252
External references
- oeis: A149059