login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo

Thanks to everyone who made a donation during our annual appeal!
To see the list of donors, or make a donation, see the OEIS Foundation home page.

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A274349 Products of two distinct Lucas numbers (2,3,4,7,11,18,...). 5
6, 8, 12, 14, 21, 22, 28, 33, 36, 44, 54, 58, 72, 77, 87, 94, 116, 126, 141, 152, 188, 198, 203, 228, 246, 304, 319, 329, 369, 398, 492, 517, 522, 532, 597, 644, 796, 836, 846, 861, 966, 1042, 1288, 1353, 1363, 1368, 1393, 1563, 1686, 2084, 2189, 2204, 2214 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..53.

EXAMPLE

6 = 2*3, 44 = 4*11.

MATHEMATICA

z = 100; f[n_] := LucasL[n]; f[1] = 2 ;

Take[Sort[Flatten[Table[f[u] f[v], {u, 1, z}, {v, 1, u - 1}]]], z]

Take[Times@@@Subsets[Join[{2}, LucasL[Range[2, 20]]], {2}]//Union, 60] (* Harvey P. Dale, Aug 13 2019 *)

CROSSREFS

Cf. A000032, A274348, A274347, A271354.

Sequence in context: A123303 A063207 A096175 * A315859 A315860 A315861

Adjacent sequences:  A274346 A274347 A274348 * A274350 A274351 A274352

KEYWORD

nonn,easy

AUTHOR

Clark Kimberling, Jun 18 2016

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified January 22 04:27 EST 2020. Contains 331133 sequences. (Running on oeis4.)