A144232 - OEIS

A144232

Prime numbers of the form 4^k +- 3.

7, 13, 19, 61, 67, 1021, 4093, 4099, 16381, 65539, 262147, 1048573, 4194301, 16777213, 268435459, 1073741827, 19342813113834066795298819, 19807040628566084398385987581, 83076749736557242056487941267521533

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OFFSET

1,1

COMMENTS

Subset of A122834.

LINKS

Table of n, a(n) for n=1..19.

MATHEMATICA

Select[Flatten[Table[4^n+{3, -3}, {n, 100}]], PrimeQ]//Union (* Harvey P. Dale, Nov 13 2020 *)

CROSSREFS

Cf. A000040, A000668, A122834, A144231

Sequence in context: A108106 A231506 A165724 * A154756 A024732 A024954

Adjacent sequences: A144229 A144230 A144231 * A144233 A144234 A144235

KEYWORD

nonn

AUTHOR

Reikku Kulon, Sep 15 2008

STATUS

approved