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), (-1, 1, 1), (1, 0, 1), (1, 1, 0)}.
A150388
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), (-1, 1, 1), (1, 0, 1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =2a(2) =7a(3) =23a(4) =102a(5) =375a(6) =1745a(7) =6878a(8) =32644a(9) =133432a(10) =640941a(11) =2686025a(12) =13008572a(13) =55465855a(14) =270114683a(15) =1167116596a(16) =5706990946a(17) =24912842259a(18) =122187282951a(19) =537859897295
External references
- oeis: A150388