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, 0), (1, 0, -1), (1, 0, 1), (1, 1, 0)}.
A150755
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, 0), (1, 0, -1), (1, 0, 1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =2a(2) =8a(3) =29a(4) =129a(5) =541a(6) =2525a(7) =11276a(8) =53863a(9) =248774a(10) =1204571a(11) =5679910a(12) =27736565a(13) =132586989a(14) =651147483a(15) =3142500414a(16) =15494753033a(17) =75299549782a(18) =372356453623
External references
- oeis: A150755