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), (0, -1, 0), (0, 1, 0), (1, 1, -1), (1, 1, 1)}.
A150849
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), (0, -1, 0), (0, 1, 0), (1, 1, -1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =2a(2) =8a(3) =32a(4) =140a(5) =624a(6) =2835a(7) =13067a(8) =60938a(9) =286498a(10) =1356904a(11) =6459691a(12) =30892611a(13) =148291664a(14) =714120564a(15) =3448426056a(16) =16692404388a(17) =80968662585a(18) =393478911192
External references
- oeis: A150849