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A057563
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Numbers k such that the k initial decimal digits of e - 2 form a prime number.
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2
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OFFSET
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1,2
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COMMENTS
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a(10) > 300000 "or so" (according to S. Batalov, Jul 06 2017). - Eric W. Weisstein, Jun 10 2017
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LINKS
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Table of n, a(n) for n=1..9.
Titanix [Broken link]
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EXAMPLE
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Since e - 2 = 0.71828182845904..., the first terms are:
k = 1 gives 7, which is prime.
k = 2 gives 71, which is prime.
k = 49 gives 7182818284590452353602874713526624977572470936999, which is prime.
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CROSSREFS
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Sequence in context: A280188 A058845 A041287 * A297819 A297989 A028479
Adjacent sequences: A057560 A057561 A057562 * A057564 A057565 A057566
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KEYWORD
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nonn,base,more
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AUTHOR
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G. L. Honaker, Jr., Oct 04 2000
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EXTENSIONS
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a(8) proved prime by Andrey V. Kulsha using Titanix.
a(9) from Serge Batalov, Jun 21 2017
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STATUS
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approved
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