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A086085
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Primes p such that p + floor(sqrt(p)) is prime.
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5
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2, 5, 19, 37, 41, 47, 71, 103, 151, 167, 197, 277, 331, 349, 401, 419, 487, 499, 577, 593, 607, 617, 619, 683, 701, 811, 829, 907, 911, 937, 941, 947, 953, 1031, 1061, 1451, 1493, 1511, 1627, 1657, 1669, 1789, 1831, 1847, 1949, 1973, 2161, 2309, 2333, 2341
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OFFSET
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1,1
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LINKS
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EXAMPLE
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a(3)=19 because 19 is prime and 19 + (floor(sqrt(19)) = 19 + (floor(4.358898944)) = 19 + 4 = 23, which is prime.
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MATHEMATICA
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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Chuck Seggelin (barkeep(AT)plastereddragon.com), Jul 08 2003
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EXTENSIONS
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STATUS
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approved
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