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, 0), (0, 0, -1), (0, 1, 1), (1, 0, 1), (1, 1, 1)}.
A151223
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, 0), (0, 0, -1), (0, 1, 1), (1, 0, 1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =3a(2) =13a(3) =57a(4) =267a(5) =1257a(6) =6017a(7) =29083a(8) =141331a(9) =690487a(10) =3385973a(11) =16649173a(12) =82076225a(13) =405330895a(14) =2004921199a(15) =9930361219a(16) =49237097027a(17) =244364421121
External references
- oeis: A151223