login
This site is supported by donations to The OEIS Foundation.
Logo

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A139221 Numbers n such that both 41+(n+n^2)/2 and 41+(n+n^2) are primes. 2
0, 3, 11, 20, 23, 27, 32, 39, 48, 51, 59, 60, 83, 108, 111, 116, 128, 132, 135, 171, 188, 203, 212, 227, 240, 263, 275, 315, 324, 356, 359, 363, 384, 392, 447, 476, 479, 515, 528, 588, 627, 647, 648, 672, 731, 759, 780, 804, 839, 864, 875, 900, 903, 968, 975 (list; graph; refs; listen; history; internal format)
OFFSET

0,2

COMMENTS

Intersection of A139220 and A056561.

MATHEMATICA

Select[Table[Range[0, 2000]], PrimeQ[41+(#+#^2)/2]&&PrimeQ[41+#+#^2]&]

CROSSREFS

Cf. A000217, A056561, A139219, A139220.

Sequence in context: A082628 A166096 A139220 * A006876 A031239 A088619

Adjacent sequences:  A139218 A139219 A139220 * A139222 A139223 A139224

KEYWORD

nonn

AUTHOR

Zak Seidov (zakseidov(AT)yahoo.com), Apr 11 2008

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Transforms | Puzzles | Hot | Classics
Recent Additions | More pages | Superseeker | Maintained by The OEIS Foundation Inc.

Content is available under The OEIS End-User License Agreement .

Last modified February 16 12:41 EST 2012. Contains 205909 sequences.