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

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 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

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.

Last modified August 4 02:10 EDT 2020. Contains 336201 sequences. (Running on oeis4.)