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, 1, 0), (0, 1, -1), (1, -1, 1), (1, 1, 1)}.
A149735
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, 1, 0), (0, 1, -1), (1, -1, 1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =1a(2) =5a(3) =17a(4) =75a(5) =309a(6) =1425a(7) =6201a(8) =29221a(9) =132289a(10) =629579a(11) =2912059a(12) =13988935a(13) =65633287a(14) =317029795a(15) =1503382545a(16) =7293409299a(17) =34848431283a(18) =169636664131a(19) =815377820679
External references
- oeis: A149735