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Search: id:A100849
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| A100849 |
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Numbers n such that n^n+n+5 is prime. |
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+0
1
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OFFSET
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1,2
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COMMENT
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Here we interpret 0^0 as 1.
a(5), a(6) very probable primes; a(7) > 10^4. [From D. S. McNeil (d.mcneil(AT)qmul.ac.uk), Mar 14 2009]
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PROGRAM
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(PARI) f2(n, k) = for(x=0, n, y=x^x+x+k; if(ispseudoprime(y), print1(x", ")))
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CROSSREFS
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Sequence in context: A078976 A001569 A092853 this_sequence A120047 A139122 A123216
Adjacent sequences: A100846 A100847 A100848 this_sequence A100850 A100851 A100852
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KEYWORD
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hard,more,nonn
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AUTHOR
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Cino Hilliard (hillcino368(AT)gmail.com), Jan 07 2005
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EXTENSIONS
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a(5),a(6) from D. S. McNeil (d.mcneil(AT)qmul.ac.uk), Mar 14 2009
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