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Search: id:A157934
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| A157934 |
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Numbers m such that m^2+1 is prime and m^2-7 = prevprime(m^2) (= A007917(m^2)). |
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+0
2
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| 54, 66, 90, 156, 240, 270, 306, 474, 570, 576, 636, 750, 780, 1080, 1320, 1350, 2034, 2154, 2406, 2700, 2760, 3204, 3240, 3306, 3480, 3516, 3756, 3774, 3984, 4056, 4086, 4140, 4146, 4176, 4716, 4734, 4794, 5154, 5370, 5424, 5550, 5664, 5700, 5850, 5856
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OFFSET
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1,1
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COMMENT
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The corresponding primes are listed in A157183 resp. A157935.
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PROGRAM
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(PARI) forstep(m=2, 9999, 2, isprime(m^2+1) & precprime(m^2)==m^2-7 & print1(m, ", "))
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CROSSREFS
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Cf. A157183, A028883, A028882, A005574, A157935.
Sequence in context: A088489 A025331 A025323 this_sequence A005129 A039532 A007244
Adjacent sequences: A157931 A157932 A157933 this_sequence A157935 A157936 A157937
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KEYWORD
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nonn
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AUTHOR
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M. F. Hasler (MHasler(AT)univ-ag.fr), Mar 18 2009
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