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A095215 Beginning with 2, greatest prime divisor of the concatenation of all previous terms. 1
2, 2, 11, 67, 3301, 670001, 670001, 2816573, 1962598272385996001, 13135299156148920427, 8195631610270280813458231, 252695623634706646276208461875953169850197045066143207, 381219345970368698157410442059827141986617742456355454248317851, 381219345970368698157410442059827141986617742456355454248317851 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
LINKS
EXAMPLE
Greatest prime divisor of 22 is 11, 2211 is 67.
PROG
(PARI) lista(nn) = {my(k=2, m); print1(k); for(n=2, nn, print1(", ", k=vecmax(factor(m=eval(Str(m, k)))[, 1]))); } \\ Jinyuan Wang, May 24 2020
CROSSREFS
Sequence in context: A069648 A275869 A175976 * A264712 A217094 A076976
KEYWORD
nonn,base
AUTHOR
Amarnath Murthy, Jun 10 2004
EXTENSIONS
More terms from Robert Gerbicz, Jun 09 2007
Offset corrected and a(12)-a(13) from Donovan Johnson, Feb 19 2011
a(14) from Jinyuan Wang, May 30 2020
STATUS
approved

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Last modified March 28 22:04 EDT 2024. Contains 371254 sequences. (Running on oeis4.)