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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
Sequence in context: A020218 A217841 A338795 * A047696 A043459 A038488
KEYWORD
base,nonn
AUTHOR
Labos Elemer, Jun 16 2003
EXTENSIONS
Example corrected by Rémy Sigrist, Apr 07 2021
STATUS
approved

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Last modified March 1 08:46 EST 2024. Contains 370430 sequences. (Running on oeis4.)