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A326236
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Numbers k such that N = k^6 is a twin rank (cf. A002822: 6N +- 1 are twin primes).
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8
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1, 1820, 2590, 4795, 5565, 8330, 8470, 10640, 10710, 15960, 16730, 19145, 24535, 26460, 34580, 37065, 41510, 42630, 43505, 48230, 59675, 69160, 84910, 90860, 99540, 103320, 112560, 114205, 117600, 127120, 129220, 131670, 143290, 152740, 161105, 164115, 170030, 175105, 181195, 185045
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OFFSET
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1,2
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COMMENTS
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Dinculescu notes that when N = m^2 (resp. m^3) > 1 is a twin rank (i.e., in A002822), then m is a multiple of 5 (resp. of 7), cf. A326232 and A326234. Thus, when N = m^6, then m is a multiple of 35. See A326235 for a(n)/35, n > 1.
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LINKS
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FORMULA
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PROG
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(PARI) select( is(n)=!for(s=1, 2, ispseudoprime(6*n^6+(-1)^s)||return), [1..10^5])
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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