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, 0), (1, 0, -1), (1, 1, 0), (1, 1, 1)}.
A150940
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, 0), (1, 0, -1), (1, 1, 0), (1, 1, 1)}.
Terms
- a(0) =1a(1) =2a(2) =9a(3) =34a(4) =158a(5) =679a(6) =3259a(7) =14778a(8) =72035a(9) =336351a(10) =1652756a(11) =7856265a(12) =38791109a(13) =186570598a(14) =924127805a(15) =4481227016a(16) =22244859809a(17) =108510762260a(18) =539484498647
External references
- oeis: A150940