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, 0), (-1, 0, 1), (-1, 1, -1), (1, 0, 0), (1, 0, 1)}.
A150309
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, 0), (-1, 0, 1), (-1, 1, -1), (1, 0, 0), (1, 0, 1)}.
Terms
- a(0) =1a(1) =2a(2) =7a(3) =21a(4) =85a(5) =294a(6) =1272a(7) =4747a(8) =21315a(9) =83292a(10) =382779a(11) =1543270a(12) =7203739a(13) =29703453a(14) =140199473a(15) =588006685a(16) =2798356537a(17) =11893946434a(18) =56963151145a(19) =244726987219
External references
- oeis: A150309