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), (-1, 1, 0), (0, 0, -1), (1, 0, 1), (1, 1, 1)}.
A150947
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), (-1, 1, 0), (0, 0, -1), (1, 0, 1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =2a(2) =9a(3) =35a(4) =151a(5) =680a(6) =3091a(7) =14151a(8) =66604a(9) =312709a(10) =1477845a(11) =7064187a(12) =33776392a(13) =161972289a(14) =782054269a(15) =3776621763a(16) =18274150703a(17) =88793910636a(18) =431582703033
External references
- oeis: A150947