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, 0, 0), (-1, 0, 1), (0, -1, 0), (1, 0, 1), (1, 1, -1)}.
A149401
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, 0, 0), (-1, 0, 1), (0, -1, 0), (1, 0, 1), (1, 1, -1)}.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =12a(4) =51a(5) =190a(6) =802a(7) =3356a(8) =14562a(9) =64178a(10) =285563a(11) =1289048a(12) =5867405a(13) =26897377a(14) =124355469a(15) =577261044a(16) =2696986274a(17) =12649353895a(18) =59567612679a(19) =281586404327
External references
- oeis: A149401