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), (0, 1, -1), (0, 1, 1), (1, 0, 0), (1, 0, 1)}.
A151140
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), (0, 1, -1), (0, 1, 1), (1, 0, 0), (1, 0, 1)}.
Terms
- a(0) =1a(1) =3a(2) =11a(3) =46a(4) =206a(5) =929a(6) =4329a(7) =20486a(8) =97355a(9) =467996a(10) =2265512a(11) =10991036a(12) =53615665a(13) =262512590a(14) =1287007951a(15) =6328945904a(16) =31190267932a(17) =153846645838a(18) =760245030978
External references
- oeis: A151140