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A176681 Numbers n such that n^2 +-5 are primes. 5
6, 12, 36, 72, 78, 168, 198, 204, 342, 432, 456, 492, 534, 588, 594, 666, 726, 756, 786, 804, 996, 1014, 1212, 1218, 1248, 1254, 1266, 1314, 1344, 1476, 1512, 1554, 1806, 1812, 1902, 2088, 2298, 2322, 2364, 2616, 2634, 3066, 3072, 3162, 3432, 3444, 3852 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

6^2=36+-5 -> primes,...

LINKS

Table of n, a(n) for n=1..47.

MATHEMATICA

Select[Range[8! ], PrimeQ[ #^2-5]&&PrimeQ[ #^2+5]&]

CROSSREFS

Cf. A097698, A108701

Sequence in context: A306899 A096932 A212976 * A064476 A324483 A239171

Adjacent sequences:  A176678 A176679 A176680 * A176682 A176683 A176684

KEYWORD

nonn

AUTHOR

Vladimir Joseph Stephan Orlovsky, Apr 23 2010

STATUS

approved

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Last modified August 18 04:50 EDT 2019. Contains 326072 sequences. (Running on oeis4.)