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, 1), (1, 0, 0), (1, 1, -1), (1, 1, 0)}.
A150080
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, 1), (1, 0, 0), (1, 1, -1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =2a(2) =6a(3) =18a(4) =68a(5) =243a(6) =976a(7) =3770a(8) =15801a(9) =63897a(10) =274579a(11) =1145669a(12) =5007818a(13) =21350852a(14) =94536191a(15) =409707470a(16) =1831505449a(17) =8037909424a(18) =36209159140a(19) =160512573672a(20) =727565190083
External references
- oeis: A150080