login
This site is supported by donations to The OEIS Foundation.
Logo

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A020139 Pseudoprimes to base 11. 2
10, 15, 70, 133, 190, 259, 305, 481, 645, 703, 793, 1105, 1330, 1729, 2047, 2257, 2465, 2821, 4577, 4921, 5041, 5185, 6601, 7869, 8113, 8170, 8695, 8911, 9730, 10585, 12403, 13333, 14521, 14981, 15841, 16705, 17711, 18705, 23377, 24130, 24727, 26335, 26467 (list; graph; refs; listen; history; internal format)
OFFSET

1,1

COMMENTS

According to Karsten Meyer (arbol01(AT)gmx.de), May 16 2006, 10 should be excluded, following the strict definition in Crandall and Pomerance.

REFERENCES

R. Crandall and C. Pomerance, "Prime Numbers - A Computational Perspective", Second Edition, Springer Verlag 2005, ISBN 0-387-25282-7 Page 132 (Theorem 3.4.2. and Algorithm 3.4.3)

J.-M. De Koninck, Ces nombres qui nous fascinent, Entry 190, p. 57, Ellipses, Paris 2008.

LINKS

R. J. Mathar, Table of n, a(n) for n=1..726

F. Richman, Primality testing with Fermat's little theorem

Index entries for sequences related to pseudoprimes

CROSSREFS

Sequence in context: A119039 A047189 A035407 * A056522 A056511 A166626

Adjacent sequences:  A020136 A020137 A020138 * A020140 A020141 A020142

KEYWORD

nonn

AUTHOR

David W. Wilson (davidwwilson(AT)comcast.net)

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Transforms | Puzzles | Hot | Classics
Recent Additions | More pages | Superseeker | Maintained by The OEIS Foundation Inc.

Content is available under The OEIS End-User License Agreement .

Last modified February 17 08:44 EST 2012. Contains 205998 sequences.