|
| |
|
|
A006919
|
|
Write down all the prime divisors in previous term!.
(Formerly M4581)
|
|
3
| |
|
|
8, 222, 2337, 31941, 33371313, 311123771, 7149317941, 22931219729, 112084656339, 3347911118189, 11613496501723, 97130517917327, 531832651281459, 3331113965338635107, 3331113965338635107
(list; graph; refs; listen; history; internal format)
|
|
|
|
OFFSET
| 1,1
|
|
|
REFERENCES
| H. Jaleebi, personal communication.
N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
|
|
|
LINKS
| P. De Geest, Home Primes
|
|
|
MATHEMATICA
| g[ n_ ] := (x = n; d = {}; While[ FactorInteger[ x ] != {}, f = FactorInteger[ x, FactorComplete -> True ][ [ 1, 1 ] ]; x = x/f; AppendTo[ d, IntegerDigits[ f ] ] ]; FromDigits[ Flatten[ d ] ]); NestList[ g, 8, 15 ]
NestList[FromDigits[Flatten[IntegerDigits/@(Table[First[#], {Last[#]}]& /@ FactorInteger[#])]]&, 8, 15] (* From Harvey P. Dale, Dec 04 2011 *)
|
|
|
CROSSREFS
| Cf. A056938, A037271-A037276, A048985, A048986, A049065.
Sequence in context: A188680 A055350 A183261 * A179122 A013377 A189445
Adjacent sequences: A006916 A006917 A006918 * A006920 A006921 A006922
|
|
|
KEYWORD
| nonn,base,nice
|
|
|
AUTHOR
| N. J. A. Sloane (njas(AT)research.att.com).
|
|
|
EXTENSIONS
| More terms from Robert G. Wilson v (rgwv(AT)rgwv.com), Sep 05 2000, who remarks that sequence stabilizes at 13th term with a prime.
|
| |
|
|
