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, 0), (1, 0, 1), (1, 1, -1)}.
A150255
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, 0), (1, 0, 1), (1, 1, -1)}.
Terms
- a(0) =1a(1) =2a(2) =6a(3) =22a(4) =86a(5) =340a(6) =1403a(7) =5912a(8) =25255a(9) =109518a(10) =478944a(11) =2112598a(12) =9392174a(13) =41972854a(14) =188575186a(15) =851123779a(16) =3855663703a(17) =17529454105a(18) =79937906002a(19) =365518321803
External references
- oeis: A150255