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), (1, 0, -1), (1, 0, 1), (1, 1, 1)}.
A150959
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), (1, 0, -1), (1, 0, 1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =2a(2) =9a(3) =35a(4) =163a(5) =709a(6) =3361a(7) =15335a(8) =73442a(9) =343390a(10) =1655716a(11) =7854801a(12) =38057357a(13) =182269560a(14) =886354596a(15) =4273408701a(16) =20840807280a(17) =100974715750a(18) =493581178083
External references
- oeis: A150959