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A131578 Numbers n such that p(n)^2-p(n)-1 and p(n)^2-p(n)+1 are twin primes with p(i)=i-th prime. 1
2, 4, 19, 34, 75, 88, 197, 221, 244, 247, 272, 278, 322, 375, 383, 399, 560, 573, 604, 618, 690, 741, 834, 1135, 1193, 1212, 1228, 1272, 1382, 1401, 1490, 1524, 1585, 1589, 1779, 1989 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
LINKS
MATHEMATICA
Select[Range[2000], AllTrue[Prime[#]^2-Prime[#]+{1, -1}, PrimeQ]&] (* The program uses the AllTrue function from Mathematica version 10 *) (* Harvey P. Dale, Jan 12 2016 *)
CROSSREFS
Sequence in context: A201379 A056727 A154140 * A018273 A047092 A229485
KEYWORD
nonn
AUTHOR
Pierre CAMI, Aug 29 2007
STATUS
approved

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Last modified March 28 05:39 EDT 2024. Contains 371235 sequences. (Running on oeis4.)