The OEIS is supported by the many generous donors to the OEIS Foundation.

 Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 59th year, we have over 358,000 sequences, and we’ve crossed 10,300 citations (which often say “discovered thanks to the OEIS”). Other ways to Give
 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A154331 Numbers m such that 12 m^2 is the average of a twin prime pair. 6
 1, 3, 4, 6, 11, 13, 17, 20, 29, 39, 94, 108, 136, 154, 158, 172, 214, 227, 245, 256, 262, 283, 288, 290, 308, 315, 328, 357, 358, 371, 403, 413, 414, 420, 475, 491, 510, 522, 536, 543, 546, 556, 559, 561, 581, 585, 622, 630, 633, 647, 666, 669, 676, 699, 735 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 LINKS Amiram Eldar, Table of n, a(n) for n = 1..10000 (terms 1..1000 from Harvey P. Dale) MATHEMATICA Select[Range[800], AllTrue[12#^2+{1, -1}, PrimeQ]&] (* The program uses the AllTrue function from Mathematica version 10 *) (* Harvey P. Dale, Aug 27 2014 *) PROG (PARI) for(i=1, 999, isprime(12*i^2+1) & isprime(12*i^2-1) & print1(i", ")) (Magma) [m:m in [1..740]| IsPrime(12*m^2-1) and IsPrime(12*m^2+1)]; // Marius A. Burtea, Jan 23 2020 CROSSREFS Cf. A037073, A154671. Sequence in context: A115018 A057030 A230430 * A001130 A348529 A069825 Adjacent sequences: A154328 A154329 A154330 * A154332 A154333 A154334 KEYWORD nonn AUTHOR M. F. Hasler, Jan 15 2009 STATUS approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified December 1 23:44 EST 2022. Contains 358485 sequences. (Running on oeis4.)