

A272909


Numbers that are the product of two Lucas numbers L(i), for i >= 1, using the Lucas numbers as defined in A000204.


6



1, 3, 4, 7, 9, 11, 12, 16, 18, 21, 28, 29, 33, 44, 47, 49, 54, 72, 76, 77, 87, 116, 121, 123, 126, 141, 188, 198, 199, 203, 228, 304, 319, 322, 324, 329, 369, 492, 517, 521, 522, 532, 597, 796, 836, 841, 843, 846, 861, 966, 1288, 1353, 1363, 1364, 1368, 1393
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OFFSET

1,2


COMMENTS

Conjecture: if c and d are consecutive terms, then d  c is a product of two Lucas numbers or a product of two Fibonacci numbers.


LINKS



MATHEMATICA

Take[Union@Flatten@Table[LucasL[i] LucasL[j], {i, 0, 15}, {j, i}], 60] (* adapted by Vincenzo Librandi, Sep 04 2016 *)


CROSSREFS



KEYWORD

nonn,easy


AUTHOR



STATUS

approved



