A274427 Positions in A274426 of products of distinct Fibonacci numbers > 1.

1, 2, 4, 5, 7, 8, 11, 12, 13, 16, 17, 18, 22, 23, 24, 25, 29, 30, 31, 32, 37, 38, 39, 40, 41, 46, 47, 48, 49, 50, 56, 57, 58, 59, 60, 61, 67, 68, 69, 70, 71, 72, 79, 80, 81, 82, 83, 84, 85, 92, 93, 94, 95, 96, 97, 98, 106, 107, 108, 109, 110, 111, 112, 113

Offset: 1

Author

Clark Kimberling, Jun 22 2016

Keywords

• nonn
• easy

Comments

Complement of A274428.

Links

• G. C. Greubel, Table of n, a(n) for n = 1..2500

Crossrefs

Cf. A274426, A274428 (complement).

Programs

Mathematica

z = 200; f[n_] := Fibonacci[n];
u = Take[Sort[Flatten[Table[f[m] f[n], {n, 3, z}, {m, 3, n - 1}]]], z]
g[n_] := LucasL[n];
v = Take[Sort[Flatten[Table[g[u] g[v], {u, 2, z}, {v, 2, u - 1}]]], z]
Intersection[u, v] (* empty *)
w = Union[u, v]  (* A274426 *)
Select[Range[300], MemberQ[u, w[[#]]] &]  (* A274427 *)
Select[Range[300], MemberQ[v, w[[#]]] &]  (* A274428 *)