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A338102 Prime terms of A338820. 3
61, 449, 661, 1987, 7583, 7817, 8431, 8779, 9677, 11003, 11311, 13033, 18311, 28411, 44449, 46327, 72901, 79153, 89599, 100403, 101581, 127423, 148861, 169789, 207511, 214657, 287503, 308303, 333493, 326251, 365941, 438887, 461191, 478679, 503389, 515923, 563723, 574127, 613747, 635639, 673487 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Terms are in the order in which they occur in A338820, which is not numerical order: e.g. a(29) = 333493 > a(30) = 326251.

LINKS

Robert Israel, Table of n, a(n) for n = 1..3700

FORMULA

a(n) = A338820(PrimePi(A338821(n))).

EXAMPLE

a(3) = 661 is the third prime term in A338820.  This is A338820(21) where prime(21) = 73 = A338821(3).

MAPLE

N:= 1000: # for terms in A338820(1)..A338820(N)

P:= [seq(ithprime(i), i=1..N)]:

R:= NULL:

for n from 1 to N do

v:= add(P[i]^2 mod P[n], i=1..n-1);

   if isprime(v) then R:= R, v fi

od:

R;

CROSSREFS

Cf. A338820, A338821.

Sequence in context: A264845 A340159 A142034 * A167445 A302531 A061002

Adjacent sequences:  A338099 A338100 A338101 * A338103 A338104 A338105

KEYWORD

nonn

AUTHOR

J. M. Bergot and Robert Israel, Nov 10 2020

STATUS

approved

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Last modified January 25 18:32 EST 2022. Contains 350572 sequences. (Running on oeis4.)