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, 0, 0), (-1, 1, 1), (0, 1, 1), (1, -1, 1), (1, 1, -1)}.
A149072
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, 0, 0), (-1, 1, 1), (0, 1, 1), (1, -1, 1), (1, 1, -1)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =11a(4) =43a(5) =179a(6) =781a(7) =3471a(8) =15741a(9) =72367a(10) =336461a(11) =1577173a(12) =7446583a(13) =35355517a(14) =168668857a(15) =807863711a(16) =3882620245a(17) =18714490787a(18) =90434837781a(19) =437982274021
External references
- oeis: A149072