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A062568
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a(n) is the smallest n-digit strong pseudoprime (in base 2).
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9
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2047, 15841, 104653, 1004653, 10323769, 100463443, 1002261781, 10000321321, 100004790097, 1000002977551, 10000130243671, 100002236680837, 1000003918690669, 10000008250001701, 100000150553089531, 1000000274500018837, 10000003599249373469
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OFFSET
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4,1
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LINKS
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EXAMPLE
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a(1)=2047 because 2047 is the smallest 4-digit strong pseudoprime to base 2.
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CROSSREFS
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KEYWORD
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hard,base,nonn
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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