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), (-1, -1, 1), (0, 1, -1), (0, 1, 1), (1, 0, 1)}.
A150265
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), (-1, -1, 1), (0, 1, -1), (0, 1, 1), (1, 0, 1)}.
Terms
- a(0) =1a(1) =2a(2) =6a(3) =22a(4) =89a(5) =340a(6) =1436a(7) =6161a(8) =25845a(9) =113360a(10) =501973a(11) =2188632a(12) =9804450a(13) =44168998a(14) =196838674a(15) =893243667a(16) =4069331906a(17) =18389008125a(18) =84192537645a(19) =386573832889
External references
- oeis: A150265