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A119885 Natural numbers with number of divisors equal to a Lucas number. 3
1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 13, 14, 15, 17, 19, 21, 22, 23, 25, 26, 27, 29, 31, 33, 34, 35, 37, 38, 39, 41, 43, 46, 47, 49, 51, 53, 55, 57, 58, 59, 61, 62, 64, 65, 67, 69, 71, 73, 74, 77, 79, 82, 83, 85, 86, 87, 89, 91, 93, 94, 95, 97, 101, 103 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Amiram Eldar, Table of n, a(n) for n = 1..10000

MATHEMATICA

lim = 250; t = LucasL /@ Range[0, lim]; Select[Range@ lim, MemberQ[t, DivisorSigma[0, #]] &]  (* Amiram Eldar, Sep 05 2019 after Michael De Vlieger at A123193 *)

CROSSREFS

For natural numbers with number of divisors equal to a Fibonacci number, see A123193. [corrected by Matthew Vandermast, Oct 29 2008]

Cf. A000032.

Sequence in context: A317468 A261355 A084384 * A007964 A095135 A135402

Adjacent sequences:  A119882 A119883 A119884 * A119886 A119887 A119888

KEYWORD

easy,nonn

AUTHOR

Giovanni Teofilatto, Aug 01 2006

STATUS

approved

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Last modified November 13 10:50 EST 2019. Contains 329093 sequences. (Running on oeis4.)