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A050118 a(n) = n-th number of the form L(i)*L(j), i<=j, when these products of Lucas numbers are arranged in order. 2
1, 2, 3, 4, 6, 7, 8, 9, 11, 12, 14, 16, 18, 21, 22, 28, 29, 33, 36, 44, 47, 49, 54, 58, 72, 76, 77, 87, 94, 116, 121, 123, 126, 141, 152, 188, 198, 199, 203, 228, 246, 304, 319, 322, 324, 329, 369, 398, 492, 517, 521, 522, 532, 597 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Robert Israel, Table of n, a(n) for n = 1..10000

MAPLE

lucas:= t -> combinat:-fibonacci(t+1) + combinat:-fibonacci(t-1):

sort(convert(select(`<`, {seq(seq(lucas(i)*lucas(j), i=j..30), j=0..30)}, lucas(31)), list)); # Robert Israel, May 11 2016

MATHEMATICA

Take[Union[Flatten[Table[LucasL[i]*LucasL[j], {i, 0, 200}, {j, 1, 200}]]], 100] (* Clark Kimberling, May 11 2016 *)

CROSSREFS

Cf. A000032.

Sequence in context: A004144 A124391 A200381 * A081754 A336654 A004436

Adjacent sequences:  A050115 A050116 A050117 * A050119 A050120 A050121

KEYWORD

nonn

AUTHOR

Clark Kimberling

STATUS

approved

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Last modified June 18 20:45 EDT 2021. Contains 345121 sequences. (Running on oeis4.)