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, 1), (1, 1, -1)}.
A150269
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, 1), (1, 1, -1)}.
Terms
- a(0) =1a(1) =2a(2) =6a(3) =22a(4) =90a(5) =375a(6) =1632a(7) =7228a(8) =32542a(9) =148889a(10) =687558a(11) =3203532a(12) =15035292a(13) =70959865a(14) =336619928a(15) =1603694686a(16) =7667719866a(17) =36781517568a(18) =176929341895a(19) =853188421537
External references
- oeis: A150269