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 A090696 Numbers k such that k^2-11 is a prime. 5
 4, 8, 10, 18, 20, 28, 32, 38, 42, 48, 52, 62, 70, 78, 80, 90, 118, 120, 130, 148, 158, 160, 172, 182, 200, 210, 218, 228, 230, 232, 238, 248, 252, 258, 260, 262, 270, 272, 290, 298, 300, 302, 318, 340, 342, 350, 358, 360, 370, 372, 378, 388, 398, 410, 412, 420 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 REFERENCES M. Cerasoli, F. Eugeni and M. Protasi, Elementi di Matematica Discreta, Bologna 1988 Emanuele Munarini and Norma Zagaglia Salvi, Matematica Discreta,UTET, CittaStudiEdizioni, Milano 1997 LINKS FORMULA a(n) = 2*A091271(n). MATHEMATICA Select[Range[4, 1200], PrimeQ[#^2-11]&] (* Vladimir Joseph Stephan Orlovsky, Feb 27 2011*) CROSSREFS A091272 gives primes, A091273 gives prime index. Sequence in context: A311008 A311009 A311010 * A048247 A276607 A130442 Adjacent sequences:  A090693 A090694 A090695 * A090697 A090698 A090699 KEYWORD nonn AUTHOR Giovanni Teofilatto, Dec 20 2003 EXTENSIONS Extended by Ray Chandler, Dec 27 2003 STATUS approved

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Last modified September 23 19:43 EDT 2018. Contains 315285 sequences. (Running on oeis4.)