A274431 Positions in A274426 of products of distinct Lucas numbers > 1 (excluding 2).

1, 2, 4, 6, 7, 10, 11, 14, 15, 16, 20, 21, 22, 26, 27, 28, 29, 34, 35, 36, 37, 42, 43, 44, 45, 46, 52, 53, 54, 55, 56, 62, 63, 64, 65, 66, 67, 74, 75, 76, 77, 78, 79, 86, 87, 88, 89, 90, 91, 92, 100, 101, 102, 103, 104, 105, 106, 114, 115, 116, 117, 118, 119

Offset: 1

Author

Clark Kimberling, Jun 22 2016

Keywords

• nonn
• easy

Comments

Complement of A274430.

Crossrefs

Cf. A274429, A274430.

Programs

Mathematica

z = 200; f[n_] := Fibonacci[n];
u = Take[Sort[Flatten[Table[f[m] f[n], {n, 3, z}, {m, 3, n - 1}]]], 100]
g[n_] := LucasL[n];
v = Take[Sort[Flatten[Table[g[u] g[v], {u, 1, z}, {v, 1, u - 1}]]], z]
Intersection[u, v]
w = Union[u, v]  (* A274429 *)
Select[Range[300], MemberQ[u, w[[#]]] &]  (* A274430 *)
Select[Range[300], MemberQ[v, w[[#]]] &]  (* A274431 *)