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, 0), (1, 0, 0), (1, 1, -1), (1, 1, 1)}.
A150789
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, 0), (1, 0, 0), (1, 1, -1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =2a(2) =8a(3) =30a(4) =136a(5) =585a(6) =2770a(7) =12583a(8) =60703a(9) =283705a(10) =1382991a(11) =6577224a(12) =32276173a(13) =155288583a(14) =765485523a(15) =3712957324a(16) =18361035980a(17) =89586761260a(18) =444040982650
External references
- oeis: A150789