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), (-1, -1, 1), (-1, 1, 1), (1, -1, 1), (1, 1, 0)}.
A149170
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), (-1, -1, 1), (-1, 1, 1), (1, -1, 1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =9a(4) =44a(5) =127a(6) =619a(7) =1989a(8) =9856a(9) =33919a(10) =168677a(11) =607001a(12) =3024616a(13) =11240063a(14) =56097646a(15) =213651441a(16) =1066929850a(17) =4142201763a(18) =20695048729a(19) =81607888787a(20) =407840022294
External references
- oeis: A149170