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, 0), (1, 0, 0), (1, 1, 0)}.
A151142
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, 0), (1, 0, 0), (1, 1, 0)}.
Terms
- a(0) =1a(1) =3a(2) =11a(3) =47a(4) =199a(5) =887a(6) =4007a(7) =18295a(8) =84839a(9) =395159a(10) =1856407a(11) =8766263a(12) =41568295a(13) =198016663a(14) =946007351a(15) =4533908791a(16) =21785184967a(17) =104907997079a(18) =506278355543
External references
- oeis: A151142