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A181863 Decimal sturdy primes: primes p such that sum of digits of k*p for any positive integer k is at least the sum of digits of p. 2
3, 11, 41, 101 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Prime elements of A181862.

Primes p such that A007953(p) = A077196(p).

Contains prime repunits A004022 as a subsequence.

a(5) > 1.4*10^7. - Giovanni Resta, Sep 18 2018

LINKS

Table of n, a(n) for n=1..4.

CROSSREFS

Cf. A143027, A181862.

Sequence in context: A131526 A329261 A073622 * A075276 A242233 A294504

Adjacent sequences:  A181860 A181861 A181862 * A181864 A181865 A181866

KEYWORD

nonn,base,more,hard

AUTHOR

Max Alekseyev, Nov 14 2010

STATUS

approved

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Last modified January 23 13:40 EST 2020. Contains 331171 sequences. (Running on oeis4.)