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A238082 Composites occurring as divisors of Fibonacci(p) with p prime. 2
4181, 10877, 75077, 162133, 330929, 1256293, 1346269, 2662277, 3636121, 4226777, 9401893, 13455077, 14787181, 16485493, 21692189, 24157817, 24493061, 25532501, 29604893, 31432381, 39247393, 73780877, 75245777, 77337941, 120485381, 124477513, 127835341, 132162581, 143221993, 143548501 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

The first two non-semiprimes are a(16) = 73 * 149 * 2221 and a(254) = 1453 * 2909 * 10177.

LINKS

David Wilson and Hans Havermann, Table of n, a(n) for n = 1..338 [David Wilson to 148, Hans Havermann to 338]

Hans Havermann, A238082 factored

Hans Havermann, Composite Prime-Index Fibonacci Numbers Factored

Antti Karttunen, More composite terms for A233281

MATHEMATICA

Drop[Select[Union[Flatten[Table[Divisors[Fibonacci[Prime[n]]], {n, 25}]]], Not[PrimeQ[#]] &], 1] (* Alonso del Arte, Feb 17 2014 *)

CROSSREFS

The sequence gives composite values of A233281.

Cf. A038672, A092395, A135952.

Sequence in context: A212424 A319168 A091982 * A072322 A045728 A048593

Adjacent sequences:  A238079 A238080 A238081 * A238083 A238084 A238085

KEYWORD

nonn

AUTHOR

Hans Havermann, Antti Karttunen and David W. Wilson, Feb 02 2014

STATUS

approved

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Last modified June 25 12:01 EDT 2019. Contains 324352 sequences. (Running on oeis4.)