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

 

Logo

Please make a donation to keep the OEIS running. We are now in our 56th year. In the past year we added 10000 new sequences and reached almost 9000 citations (which often say "discovered thanks to the OEIS").
Other ways to donate

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A020256 Strong pseudoprimes to base 30. 1
49, 133, 341, 403, 871, 901, 931, 2059, 2077, 3277, 6031, 8023, 8401, 9881, 11041, 17593, 24929, 26599, 27001, 27133, 33227, 38503, 42127, 43213, 48133, 54961, 66197, 79003, 96049, 106597, 127697, 135137, 137801, 148417, 149761, 163081, 170431 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

R. J. Mathar, Table of n, a(n) for n = 1..203

Index entries for sequences related to pseudoprimes

CROSSREFS

Sequence in context: A211727 A304674 A257524 * A304171 A118160 A211501

Adjacent sequences:  A020253 A020254 A020255 * A020257 A020258 A020259

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 November 24 20:34 EST 2020. Contains 338616 sequences. (Running on oeis4.)