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 A138658 Primes p such that 54*p-1 and 54*p+1 are twin primes. 4
 2, 5, 37, 83, 173, 223, 257, 313, 673, 1093, 1217, 1447, 1667, 1777, 1933, 1973, 1997, 2273, 2393, 2423, 2473, 2557, 2767, 2843, 2857, 3467, 3767, 3877, 4073, 4513, 4957, 5273, 5657, 5783, 5867, 6047, 6427, 6977, 7307, 7867, 9007, 9137, 9227, 9343, 9697 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS H. v. Eitzen, Table of n, a(n) for n=1,.., 10513 (i.e. all a(n) below 10^7) EXAMPLE 54*2-1=107, 54*2+1=109; 54*5-1=269, 54*5+1=271; ... MATHEMATICA a=54; Select[Prime[Range[10^3]], PrimeQ[a*#-1]&&PrimeQ[a*#+1]&] Select[Prime[Range[1200]], AllTrue[54#+{1, -1}, PrimeQ]&] (* Harvey P. Dale, Mar 01 2023 *) CROSSREFS Sequence in context: A163499 A086218 A202637 * A067464 A081545 A274074 Adjacent sequences: A138655 A138656 A138657 * A138659 A138660 A138661 KEYWORD nonn AUTHOR Vladimir Joseph Stephan Orlovsky, May 15 2008 EXTENSIONS More terms from b-file by Hagen von Eitzen, Jun 17 2009 STATUS approved

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Last modified May 20 14:08 EDT 2024. Contains 372717 sequences. (Running on oeis4.)