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A085759
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Prime powers of the form 4n+1.
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6
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1, 5, 9, 13, 17, 25, 29, 37, 41, 49, 53, 61, 73, 81, 89, 97, 101, 109, 113, 121, 125, 137, 149, 157, 169, 173, 181, 193, 197, 229, 233, 241, 257, 269, 277, 281, 289, 293, 313, 317, 337, 349, 353, 361, 373, 389, 397, 401, 409, 421, 433, 449, 457, 461, 509, 521
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OFFSET
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1,2
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LINKS
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FORMULA
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MATHEMATICA
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PROG
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(PARI) list(lim)=my(v=List([1])); forprime(p=5, lim\=1, if(p%4==1, listput(v, p))); for(e=2, logint(lim, 3), forprime(p=3, sqrtnint(lim, e), if(e%2==0 || p%4==1, listput(v, p^e)))); Set(v) \\ Charles R Greathouse IV, Jul 12 2018
(Magma) [1] cat [4*k+1:k in [1..140]|IsPrimePower(4*k+1)]; // Marius A. Burtea, Sep 07 2019
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CROSSREFS
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KEYWORD
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nonn,easy
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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