The OEIS is supported by the many generous donors to the OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A248921 Primes in the pentanacci numbers sequence A000322. 1
 5, 17, 977, 28697, 56417, 1428864769, 2809074173, 21344178433, 626815657409, 18407729752001, 2317881588988297338942875602391948125494800020122167809, 136507010958920295813169620935932629930648432530102206331972221346174230852977164801 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS a(13) is too large to display here. It has 132 digits and is the 450th term in A000322. LINKS Harvey P. Dale, Table of n, a(n) for n = 1..19 MATHEMATICA a={1, 1, 1, 1, 1}; For[n=5, n<=1000, n++, sum=Plus@@a; If[PrimeQ[sum], Print[sum]]; a=RotateLeft[a]; a[[5]]=sum] Select[With[{c={1, 1, 1, 1, 1}}, LinearRecurrence[c, c, 300]], PrimeQ] (* Harvey P. Dale, Nov 30 2019 *) CROSSREFS Cf. A001590, A001631, A100683, A231574, A231575, A232543, A214899, A020992, A233554, A214727, A234696, A141523, A235862, A214825, A235873, A001630, A241660, A247027, A000288, A247561, A000322, A248920. Sequence in context: A245568 A218378 A119531 * A172996 A253624 A085832 Adjacent sequences: A248918 A248919 A248920 * A248922 A248923 A248924 KEYWORD nonn AUTHOR Robert Price, Oct 16 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 | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified April 23 15:20 EDT 2024. Contains 371916 sequences. (Running on oeis4.)