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, 0, 0), (0, 0, 1), (0, 1, 1), (1, -1, 0), (1, 0, -1)}.
A150554
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, 0, 0), (0, 0, 1), (0, 1, 1), (1, -1, 0), (1, 0, -1)}.
Terms
- a(0) =1a(1) =2a(2) =7a(3) =26a(4) =105a(5) =444a(6) =1932a(7) =8601a(8) =38930a(9) =178481a(10) =826762a(11) =3861570a(12) =18160660a(13) =85900052a(14) =408283798a(15) =1948675114a(16) =9334185779a(17) =44850984953a(18) =216102816636
External references
- oeis: A150554