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), (-1, 1, -1), (0, -1, 0), (1, 1, 0)}.
A149117
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), (-1, 1, -1), (0, -1, 0), (1, 1, 0)}.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =9a(4) =32a(5) =101a(6) =347a(7) =1243a(8) =4498a(9) =16617a(10) =63167a(11) =240235a(12) =931568a(13) =3647803a(14) =14370312a(15) =57180711a(16) =229115778a(17) =922313297a(18) =3737973883a(19) =15221602137a(20) =62225061536a(21) =255556165925
External references
- oeis: A149117