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, 0, -1), (-1, 1, 1), (0, 1, 1), (1, 0, 0)}.
A149994
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, 0, -1), (-1, 1, 1), (0, 1, 1), (1, 0, 0)}.
Terms
- a(0) =1a(1) =2a(2) =5a(3) =17a(4) =59a(5) =214a(6) =803a(7) =3056a(8) =11895a(9) =47004a(10) =187667a(11) =756321a(12) =3069385a(13) =12542846a(14) =51578053a(15) =213150329a(16) =884724627a(17) =3686093838a(18) =15410995185a(19) =64642971735a(20) =271932636847
External references
- oeis: A149994