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Search: id:A070303
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| A070303 |
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Primes p such that the equation p^2x^2==0 (mod p^2+x^2) has no solution. |
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+0
1
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| 3, 7, 11, 13, 19, 23, 29, 31, 41, 43, 47, 53, 59, 61, 67, 71, 73, 79, 83, 89, 97, 103, 107, 109, 113, 127, 131, 137, 139, 149, 151, 157, 163, 167, 173, 179, 181, 191, 193, 199, 211, 223, 227, 229, 233, 239, 241, 251, 263, 269, 271, 277, 281, 283, 293, 307, 311
(list; graph; listen)
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OFFSET
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1,1
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FORMULA
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primes not in A002496(n) (i.e. not of the form k^2+1)
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PROGRAM
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(PARI) for(n=1, 350, if(0==sum(i=1, n^2, if((n^2*i^2)%(n^2+i^2), 1-isprime(n), 1)), print1(n, ", ")))
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CROSSREFS
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Sequence in context: A123988 A045418 A090456 this_sequence A136087 A091250 A077256
Adjacent sequences: A070300 A070301 A070302 this_sequence A070304 A070305 A070306
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KEYWORD
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easy,nonn
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AUTHOR
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Benoit Cloitre (benoit7848c(AT)orange.fr), May 10 2002
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