The OEIS is supported by the many generous donors to the OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A325882 Bases b where exactly six primes p with p < b exist such that p is a base-b Wieferich prime. 9
 361, 476, 699, 977, 1121, 1145, 1293, 1667, 1745, 1868, 2157, 2382, 2468, 2665, 2793, 2897, 3038, 3149, 3526, 4033, 4643, 4746, 4789, 5032, 5073, 5567, 5651, 5660, 5777, 5824, 6205, 6320, 6346, 6377, 6421, 6732, 6769, 6949, 6957, 6976, 7318, 7669, 7793, 7937 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Numbers n such that A255920(n) = 6. LINKS Table of n, a(n) for n=1..44. PROG (PARI) is(n) = my(i=0); forprime(p=1, n-1, if(Mod(n, p^2)^(p-1)==1, i++)); i==6 CROSSREFS Cf. A255920. Cf. bases b with exactly k base-b Wieferich primes less than b: A255921 (k=0), A255922 (k=1), A255923 (k=2), A255924 (k=3), A255925 (k=4), A325881 (k=5), A325883 (k=7), A325884 (k=8), A325885 (k=9), A325886 (k=10). Sequence in context: A003799 A003930 A137607 * A255787 A219340 A183997 Adjacent sequences: A325879 A325880 A325881 * A325883 A325884 A325885 KEYWORD nonn AUTHOR Felix Fröhlich, May 26 2019 STATUS approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified June 10 13:34 EDT 2023. Contains 363205 sequences. (Running on oeis4.)