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, 1), (1, -1, 0), (1, 0, -1)}.
A149029
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, 1), (1, -1, 0), (1, 0, -1)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =10a(4) =33a(5) =118a(6) =461a(7) =1806a(8) =7192a(9) =29586a(10) =123208a(11) =519050a(12) =2212177a(13) =9504493a(14) =41204497a(15) =179859178a(16) =789416425a(17) =3484337220a(18) =15452094569a(19) =68819851405a(20) =307696191256
External references
- oeis: A149029