login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A020248 Strong pseudoprimes to base 22. 1
21, 91, 169, 485, 1183, 1247, 2047, 5551, 11557, 14111, 15229, 17767, 19909, 21667, 23651, 38503, 47197, 49141, 53131, 64907, 70579, 72581, 90851, 100711, 109061, 144433, 146611, 153553, 157753, 158237, 163831, 191959, 204263, 222529, 223721 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

R. J. Mathar, Table of n, a(n) for n = 1..215

Index entries for sequences related to pseudoprimes

CROSSREFS

Sequence in context: A223370 A223363 A284440 * A225705 A259758 A203173

Adjacent sequences:  A020245 A020246 A020247 * A020249 A020250 A020251

KEYWORD

nonn

AUTHOR

David W. Wilson

STATUS

approved

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

License Agreements, Terms of Use, Privacy Policy. .

Last modified August 3 06:43 EDT 2021. Contains 346435 sequences. (Running on oeis4.)