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Search: id:A073019
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| A073019 |
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Numbers n such that the real part of (1+2I)^n is prime. |
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+0
1
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| 2, 3, 4, 5, 7, 11, 13, 17, 19, 89, 163, 167, 233, 251, 349, 401, 757, 1423, 3049, 3643, 11987
(list; graph; listen)
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OFFSET
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1,1
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MATHEMATICA
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x=1; For[n=1, n<=14000, n++, {x=(1+2*I)*x, If[PrimeQ[Re[x]], Print[n]]}]
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CROSSREFS
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Cf. A006495.
Adjacent sequences: A073016 A073017 A073018 this_sequence A073020 A073021 A073022
Sequence in context: A036844 A033070 A046022 this_sequence A007885 A003037 A046420
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KEYWORD
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nonn
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AUTHOR
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Benoit Cloitre (benoit7848c(AT)orange.fr), Aug 03 2002
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EXTENSIONS
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Edited by John W. Layman (layman(AT)math.vt.edu), Aug 13 2002
a(21) from Robert G. Wilson v (rgwv(AT)rgwv.com), Aug 22 2002
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