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A153581
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Pseudoprimes to bases 2,3,5 and 7 which are neither 1 nor Carmichael numbers A002997
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2
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OFFSET
| 1,1
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MATHEMATICA
| Select[Range[5*10^7], ! PrimeQ[ # ] && PowerMod[2, # - 1, # ] == 1 && PowerMod[3, # - 1, # ] == 1 && PowerMod[5, # - 1, # ] == 1 && && PowerMod[7, # - 1, # ] == 1 && Mod[ #, CarmichaelLambda[ # ]] != 1 &] (*Ray Chandler*)
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CROSSREFS
| A002997, A083737, A122780, A153508, A153513, A153514, A153515, A153519, A153580
Sequence in context: A015346 A190932 A153580 * A100383 A204150 A156867
Adjacent sequences: A153578 A153579 A153580 * A153582 A153583 A153584
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KEYWORD
| nonn
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AUTHOR
| Ray Chandler & Artur Jasinski (grafix(AT)csl.pl), Dec 28 2008
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