A338102 Prime terms of A338820.

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

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