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 A081888 Numbers n such that the least positive primitive root of n is larger than the value for all positive numbers smaller than n. 3
 1, 3, 4, 6, 22, 118, 191, 362, 842, 2042, 2342, 3622, 16022, 29642, 66602, 110881, 143522, 535802, 5070662, 6252122, 6497402, 10219442, 69069002 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS A081889 gives the primitive roots itself. Difference from A002229, A002230: In consideration of all n having primitive roots. A002229, A002230 only primes. LINKS FORMULA Numbers 1, 2, 4, p^m and 2*p^m have primitive roots for odd primes p and m >=1 natural number. MAPLE a306252 := proc(n::integer)     local r;     r := numtheory[primroot](n) ;     if r <> FAIL then         return r ;     else         return -1 ;     end if; end proc: A081888 := proc()     local rec, n, lpr ;     rec := -1 ;     for n from 1 do         lpr := a306252(n) ;         if lpr > rec then             printf("%d, \n", n) ;             rec := lpr ;         end if;     end do: end proc: A081888() ; # R. J. Mathar, Apr 04 2019 CROSSREFS Cf. A081889, A002229, A002230. Positions of records of A306252. Sequence in context: A265735 A038520 A294990 * A306493 A019209 A019120 Adjacent sequences:  A081885 A081886 A081887 * A081889 A081890 A081891 KEYWORD nonn,more AUTHOR Sven Simon, Mar 30 2003 STATUS approved

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Last modified August 19 06:22 EDT 2022. Contains 356216 sequences. (Running on oeis4.)