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Search: id:A130828
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| A130828 |
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Primes p such that the sum of the digitis of p^p is a prime. |
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+0
1
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| 5, 11, 19, 29, 37, 43, 89, 97, 113, 139, 269, 311, 337, 359, 367, 433
(list; graph; listen)
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OFFSET
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1,1
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COMMENT
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Computed by Emeric Deutsch.
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EXAMPLE
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For 5^5=625, 6+2+5=13 which is a prime.
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MAPLE
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sd := proc (n) options operator, arrow: add(convert(n, base, 10)[j], j = 1 .. nops(convert(n, base, 10))) end proc: a := proc (n) if isprime(sd(ithprime(n)^ithprime(n))) = true then ithprime(n) else end if end proc: seq(a(n), n = 1 .. 90); - Emeric Deutsch (deutsch(AT)duke.poly.edu), Jul 19 2007
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CROSSREFS
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Sequence in context: A089270 A038872 A141158 this_sequence A108151 A088059 A165900
Adjacent sequences: A130825 A130826 A130827 this_sequence A130829 A130830 A130831
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KEYWORD
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nonn,base,less
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AUTHOR
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J. M. Bergot (thekingfishb(AT)yahoo.ca), Jul 17 2007
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