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, 0), (0, 0, -1), (0, 1, 0), (1, 0, 1)}.
A150248
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, 0), (0, 0, -1), (0, 1, 0), (1, 0, 1)}.
Terms
- a(0) =1a(1) =2a(2) =6a(3) =22a(4) =85a(5) =334a(6) =1369a(7) =5737a(8) =24429a(9) =105210a(10) =458907a(11) =2017030a(12) =8934788a(13) =39818221a(14) =178494163a(15) =803531368a(16) =3633315259a(17) =16486794354a(18) =75067367685a(19) =342736848551
External references
- oeis: A150248