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Search: id:A100837
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| A100837 |
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Numbers n such that n^n+4 is prime. |
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+0
1
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OFFSET
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1,3
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COMMENT
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From a post in [primeNumbers]
Here we interpret 0^0 as 1.
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MATHEMATICA
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For[n = 1, n < 1000, n++, If[ PrimeQ[n^n + 4], Print[n]]] - Stefan Steinerberger (stefan.steinerberger(AT)gmail.com), Apr 02 2006
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PROGRAM
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(PARI) f1(n, a) = for(x=0, n, y=x^x+a; if(ispseudoprime(y), print1(y", ")))
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CROSSREFS
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Sequence in context: A143684 A156893 A050639 this_sequence A019011 A036842 A041349
Adjacent sequences: A100834 A100835 A100836 this_sequence A100838 A100839 A100840
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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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1 more term. Next term exceeds 15000. Sean A. Irvine (sairvin(AT)xtra.co.nz), Sep 09 2009
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