A176684 - OEIS

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A176684

Numbers k such that k^3 +-5 are primes.

2

2, 12, 48, 66, 78, 126, 192, 324, 576, 738, 858, 1806, 2466, 2496, 2688, 3186, 3276, 3978, 4092, 4248, 4404, 4884, 5034, 5274, 5352, 5898, 6018, 6198, 6396, 6408, 6516, 6708, 6852, 7368, 7914, 8304, 8628, 8658, 8904, 9048, 9168, 9528, 10812, 10932

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OFFSET

1,1

LINKS

Daniel Starodubtsev, Table of n, a(n) for n = 1..10000

EXAMPLE

12 is in the sequence, because 12^3 - 5 = 1723 and 12^3 + 5 = 1733 are primes.

MATHEMATICA

Select[Range[8! ], PrimeQ[ #^3-5]&&PrimeQ[ #^3+5]&]

CROSSREFS

Cf. A090121, A097698, A108701, A143904, A176681, A176682, A176683

Sequence in context: A319763 A320684 A069946 * A216152 A048501 A001815

Adjacent sequences: A176681 A176682 A176683 * A176685 A176686 A176687

KEYWORD

nonn

AUTHOR

Vladimir Joseph Stephan Orlovsky, Apr 23 2010

STATUS

approved