A171431 Primes that are congruent to 4 mod n, where n is the index of the prime.

2, 379, 389, 9559969, 9559999, 9560119, 9560149, 514274011, 3779851261, 204475055129, 81744303090431, 241849345578327127, 241849345578334537, 241849345578337111, 241849345578359263, 241849345578372913, 241849345578373303, 97199410027250043229, 97199410027250048629, 97199410027250052679

Offset

1,1

Links

Table of n, a(n) for n=1..20.

Mathematica

Prime@ Select[Range[10^6], Mod[Prime[#] - 4, #] == 0 &] (* Giovanni Resta, Feb 25 2020 *)

Crossrefs

Cf. A023146, A048891, A171430.

Sequence in context: A320445 A142532 A329555 * A280281 A225096 A225111

Adjacent sequences: A171428 A171429 A171430 * A171432 A171433 A171434

Keyword

nonn

Author

Vladimir Joseph Stephan Orlovsky, Dec 08 2009

Extensions

Missing a(1) and a(8)-a(20) from Giovanni Resta, Feb 23 2020

Status

approved