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

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A084319 Orbit of 91 under function described in A084317. 8
 91, 713, 2331, 3737, 37101, 383149, 1329473, 10912197, 328312853, 1129846623, 3735159117, 31245053039, 173977184859, 3293176308321, 319269241788861, 371325123869195203, 1278647733810375857, 1665622037676698019, 31742715741254857303, 56627509560552923867 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,1 COMMENTS This sequence takes 64 steps to reach a prime (which implies A343156(91)=64). - N. J. A. Sloane, Apr 07 2021 REFERENCES Eric Angelini, W. Edwin Clark, Hans Havermann, Frank Stevenson, Allan C. Wechsler, and others, Postings to Math Fun mailing list, April 2021. LINKS W. Edwin Clark, Table of n, a(n) for n = 0..63 [The trajectory to the first prime.] EXAMPLE a(29) = 19797186041838357425713338412621, the 29th iterate. MATHEMATICA NestList[FromDigits@ Flatten@ IntegerDigits@ Map[First, FactorInteger@ #] &, 91, 17] (* Michael De Vlieger, Mar 25 2017 *) CROSSREFS Cf. A084317, A056938, A084318, A343156. Sequence in context: A020218 A217841 A338795 * A047696 A043459 A038488 Adjacent sequences: A084316 A084317 A084318 * A084320 A084321 A084322 KEYWORD base,nonn AUTHOR Labos Elemer, Jun 16 2003 EXTENSIONS Example corrected by Rémy Sigrist, Apr 07 2021 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 March 1 08:46 EST 2024. Contains 370430 sequences. (Running on oeis4.)