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

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A052155 Pseudoprimes to both base 2 and base 3, i.e. intersection of A001567 and A005935. 5
1105, 1729, 2465, 2701, 2821, 6601, 8911, 10585, 15841, 18721, 29341, 31621, 41041, 46657, 49141, 52633, 63973, 75361, 83333, 83665, 88561, 90751, 93961, 101101, 104653, 107185, 115921, 126217, 162401, 172081, 176149, 188461 (list; graph; refs; listen; history; internal format)
OFFSET

1,1

LINKS

R. J. Mathar, Table of n, a(n) for n=1..201

J. Bernheiden, Pseudoprimes (Text in German)

MATHEMATICA

Select[ Range[228240], !PrimeQ[ # ] && PowerMod[2, # - 1, # ] == 1 && PowerMod[3, # - 1, # ] == 1 &]

CROSSREFS

Cf. A001567, A005935, A083737.

Sequence in context: A025314 A025287 A025305 * A097102 A159781 A102924

Adjacent sequences:  A052152 A052153 A052154 * A052156 A052157 A052158

KEYWORD

nice,nonn

AUTHOR

Harvey P. Dale (hpd1(AT)is2.nyu.edu), Jan 24 2000

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 14 23:16 EST 2012. Contains 205687 sequences.