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 A347934 Primes p of the form k^2 + 1 such that p+2 and 2p+1 are also prime. 1
 5, 25601, 193601, 1144901, 1464101, 4326401, 6100901, 12390401, 23522501, 72931601, 127012901, 245862401, 256960901, 351937601, 441840401, 732784901, 802588901, 951722501, 1621672901, 2024100101, 2070250001, 2217468101, 2219352101, 2428518401, 2930056901, 2963713601 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS All primes (except 5) in the sequence are of the form 100*k^2 + 1. LINKS Table of n, a(n) for n=1..26. MATHEMATICA Select[Range[50000]^2 + 1, AllTrue[{#, # + 2, 2*# + 1}, PrimeQ] &] (* Amiram Eldar, Sep 20 2021 *) CROSSREFS Intersection of A002496 and A045536. Sequence in context: A201002 A246870 A193366 * A228547 A193148 A307492 Adjacent sequences: A347931 A347932 A347933 * A347935 A347936 A347937 KEYWORD nonn AUTHOR Angad Singh, Sep 20 2021 STATUS approved

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Last modified May 21 19:35 EDT 2024. Contains 372738 sequences. (Running on oeis4.)