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

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A020225 Pseudoprimes to base 97. 1
4, 6, 8, 12, 16, 21, 24, 32, 48, 49, 66, 96, 105, 147, 176, 186, 231, 245, 341, 344, 469, 481, 496, 561, 637, 645, 651, 833, 946, 949, 973, 1056, 1065, 1068, 1105, 1128, 1729, 1813, 1891, 2046, 2047, 2465, 2701, 2821, 2976, 3053, 3277, 3283, 3577, 4187 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Composite numbers n such that 97^(n-1) == 1 (mod n).
LINKS
MATHEMATICA
base = 97; t = {}; n = 1; While[Length[t] < 100, n++; If[! PrimeQ[n] && PowerMod[base, n-1, n] == 1, AppendTo[t, n]]]; t (* T. D. Noe, Feb 21 2012 *)
CROSSREFS
Cf. A001567 (pseudoprimes to base 2).
Sequence in context: A225512 A233036 A062554 * A310663 A162294 A344994
KEYWORD
nonn
AUTHOR
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.

License Agreements, Terms of Use, Privacy Policy. .

Last modified March 29 08:13 EDT 2024. Contains 371265 sequences. (Running on oeis4.)