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, 0, 0), (0, 1, 0), (1, 0, -1), (1, 0, 1)}.
A150254
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, 0, 0), (0, 1, 0), (1, 0, -1), (1, 0, 1)}.
Terms
- a(0) =1a(1) =2a(2) =6a(3) =22a(4) =85a(5) =349a(6) =1468a(7) =6302a(8) =27704a(9) =123340a(10) =556184a(11) =2532801a(12) =11624413a(13) =53751684a(14) =249963668a(15) =1168605027a(16) =5488578815a(17) =25879275290a(18) =122468470869a(19) =581379728926
External references
- oeis: A150254