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A140658 Overpseudoprimes to bases 2 and 3. 1
5173601, 13694761, 16070429, 27509653, 54029741, 66096253, 102690677, 117987841, 193949641, 206304961, 314184487, 390612221, 393611653, 717653129, 960946321, 1157839381, 1236313501, 1481626513, 1860373241, 1921309633, 2217879901, 2412172153, 2626783921 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

From the first 19 strong pseudoprimes to bases 2 and 3 (A072276) only 6 are overpseudoprimes to the same bases.

LINKS

Amiram Eldar, Table of n, a(n) for n = 1..105

CROSSREFS

Cf. A001262, A072276, A141232, A141350, A020229.

Sequence in context: A157844 A263039 A241607 * A172715 A257153 A257160

Adjacent sequences:  A140655 A140656 A140657 * A140659 A140660 A140661

KEYWORD

nonn

AUTHOR

Vladimir Shevelev, Jul 10 2008

EXTENSIONS

More terms from Amiram Eldar, Jun 24 2019

STATUS

approved

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Last modified December 13 06:26 EST 2019. Contains 329968 sequences. (Running on oeis4.)