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), (-1, 1, 1), (1, 0, 1), (1, 1, -1)}.
A149418
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), (-1, 1, 1), (1, 0, 1), (1, 1, -1)}.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =12a(4) =55a(5) =184a(6) =879a(7) =3283a(8) =15929a(9) =62222a(10) =305006a(11) =1233715a(12) =6081876a(13) =25181122a(14) =124578183a(15) =524939078a(16) =2603359344a(17) =11120535185a(18) =55244397220a(19) =238564600702
External references
- oeis: A149418