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, 0), (1, 1, -1), (1, 1, 1)}.
A149732
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, 0), (1, 1, -1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =1a(2) =5a(3) =17a(4) =75a(5) =301a(6) =1313a(7) =5779a(8) =26021a(9) =118653a(10) =545231a(11) =2525549a(12) =11788379a(13) =55289461a(14) =260927137a(15) =1235788601a(16) =5876795881a(17) =28036136445a(18) =134127337005a(19) =643415715839
External references
- oeis: A149732