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 A052155 Pseudoprimes to both base 2 and base 3, i.e., intersection of A001567 and A005935. 12
 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; text; internal format)
 OFFSET 1,1 LINKS Charles R Greathouse IV, Table of n, a(n) for n = 1..10000 (first 201 terms from R. J. Mathar) J. Bernheiden, Pseudoprimes (Text in German) MATHEMATICA Select[ Range[228240], !PrimeQ[ # ] && PowerMod[2, # - 1, # ] == 1 && PowerMod[3, # - 1, # ] == 1 &] PROG (PARI) is(n)=!isprime(n)&&Mod(2, n)^(n-1)==1&&Mod(3, n)^(n-1)==1 \\ Charles R Greathouse IV, Apr 12 2012 CROSSREFS Cf. A001567, A005935, A083737. Sequence in context: A025314 A025287 A025305 * A097102 A281877 A159781 Adjacent sequences:  A052152 A052153 A052154 * A052156 A052157 A052158 KEYWORD nice,nonn AUTHOR Harvey P. Dale, Jan 24 2000 STATUS approved

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Last modified April 16 07:59 EDT 2021. Contains 343030 sequences. (Running on oeis4.)