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), (0, 1, -1), (0, 1, 0), (1, 0, 0), (1, 1, 1)}.
A151157
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), (0, 1, -1), (0, 1, 0), (1, 0, 0), (1, 1, 1)}.
Terms
- a(0) =1a(1) =3a(2) =11a(3) =47a(4) =209a(5) =961a(6) =4512a(7) =21421a(8) =102808a(9) =496807a(10) =2413594a(11) =11779861a(12) =57683735a(13) =283272704a(14) =1394366123a(15) =6876523311a(16) =33968458501a(17) =168026808732a(18) =832125985706
External references
- oeis: A151157