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), (1, 1, 0), (1, 1, 1)}.
A150955
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), (1, 1, 0), (1, 1, 1)}.
Terms
- a(0) =1a(1) =2a(2) =9a(3) =35a(4) =157a(5) =694a(6) =3197a(7) =14762a(8) =69275a(9) =326656a(10) =1552465a(11) =7408721a(12) =35521221a(13) =170851144a(14) =824310817a(15) =3986799651a(16) =19325446717a(17) =93854226532a(18) =456581326841
External references
- oeis: A150955