

A339536


Numbers b > 1 such that the smallest seven primes, i.e., 2, 3, 5, 7, 11, 13 and 17 are baseb Wieferich primes.


6



4486949, 4651993, 4941649, 5571593, 11903257, 19397501, 19841257, 19942001, 20610901, 21530501, 25793893, 42969601, 44404093, 46336949, 51509701, 52786493, 53740457, 54561401, 56120257, 56904857, 63789749, 64028593, 65497301, 65666449, 68441957, 72582101
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OFFSET

1,1


LINKS

Table of n, a(n) for n=1..26.


PROG

(PARI) is(n) = forprime(p=1, 17, if(Mod(n, p^2)^(p1)!=1, return(0))); 1


CROSSREFS

Cf. A256236. Row 1 of A319064.
Cf. smallest k primes are baseb Wieferich primes: A339531 (k=2), A339532 (k=3), A339533 (k=4), A339534 (k=5), A339535 (k=6), A339537 (k=8).
Sequence in context: A244575 A105649 A015337 * A319064 A344831 A183679
Adjacent sequences: A339533 A339534 A339535 * A339537 A339538 A339539


KEYWORD

nonn


AUTHOR

Felix Fröhlich, Dec 08 2020


STATUS

approved



