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A138938
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Indices k such that A019326(k)=Phi[k](8) is prime, where Phi is a cyclotomic polynomial.
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2
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1, 3, 9, 30, 42, 78, 87, 138, 189, 303, 318, 330, 408, 462, 504, 561, 1002, 1389, 1746, 1794, 2040, 2418, 2790, 3894, 4077, 4722, 6738, 10641, 14610, 14616, 15294, 16662, 18966, 19059, 26142, 27144, 28299, 31638, 33639, 39360
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OFFSET
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1,2
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LINKS
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MATHEMATICA
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Select[Range[1000], PrimeQ[Cyclotomic[#, 8]] &]
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PROG
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(PARI) for( i=1, 999, ispseudoprime( polcyclo(i, 8)) && print1( i", ")) /* use ...subst( polcyclo(i), x, 8)... in PARI < 2.4.2 */
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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