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, 1, -1), (0, 1, 1), (1, 0, 1), (1, 1, -1)}.
A150756
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, 1, -1), (0, 1, 1), (1, 0, 1), (1, 1, -1)}.
Terms
- a(0) =1a(1) =2a(2) =8a(3) =29a(4) =130a(5) =553a(6) =2515a(7) =11426a(8) =52963a(9) =247054a(10) =1163937a(11) =5509637a(12) =26242160a(13) =125450152a(14) =602110982a(15) =2898460907a(16) =13991096562a(17) =67694836745a(18) =328216172868
External references
- oeis: A150756