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A343532 Primes in A343531. 1


%S 2,7,31,83,307,503,919,1483,5059,9439,10139,13159,15647,17431,21491,

%T 23671,30911,33599,47459,49199,52627,58199,62327,79379,81551,90971,

%U 98443,109171,114643,123439,162007,168863,172331,175811,278767,298303,303011,322951,376399,387631,393007,571531,592531

%N Primes in A343531.

%H Robert Israel, <a href="/A343532/b343532.txt">Table of n, a(n) for n = 1..4320</a>

%e a(3) = 31 = A343531(4) and is prime, so it is in the sequence.

%p P:= [seq(ithprime(i),i=1..1001)]:

%p G:= P[2..-1]-P[1..-2]:

%p A:= [seq(add(P[i]*G[n+1-i],i=1..n),n=1..1000)]:

%p select(isprime,A);

%Y Cf. A343531.

%K nonn

%O 1,1

%A _J. M. Bergot_ and _Robert Israel_, Apr 18 2021

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Last modified October 28 13:26 EDT 2021. Contains 348329 sequences. (Running on oeis4.)