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, 1), (-1, 1, -1), (1, -1, 1), (1, 1, 0)}.
A149223
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, 1), (-1, 1, -1), (1, -1, 1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =10a(4) =44a(5) =143a(6) =645a(7) =2333a(8) =10804a(9) =41382a(10) =195006a(11) =774641a(12) =3692203a(13) =15044390a(14) =72285570a(15) =300150790a(16) =1450591128a(17) =6112145019a(18) =29668516604a(19) =126484995804a(20) =616040140558
External references
- oeis: A149223