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, 1), (1, 0, -1), (1, 0, 1), (1, 1, 0)}.
A150791
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, 1), (1, 0, -1), (1, 0, 1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =2a(2) =8a(3) =30a(4) =137a(5) =589a(6) =2808a(7) =12781a(8) =62089a(9) =291115a(10) =1428284a(11) =6816121a(12) =33635236a(13) =162350760a(14) =804067233a(15) =3911333464a(16) =19418285920a(17) =94983590146a(18) =472344514041
External references
- oeis: A150791