A092044 - OEIS

A092044

Numbers n such that prime(n) == -2 (mod n).

1, 11, 71, 637319, 637323, 637327, 179993015, 1208198861, 8179002163, 8179002189, 55762149067, 55762149103, 6201265271239787, 43525513764814971, 43525513764815121, 2159986889494444325, 2159986889494445481, 2159986889494445499, 2159986889494447181

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OFFSET

1,2

LINKS

Table of n, a(n) for n=1..19.

MATHEMATICA

NextPrim[n_] := Block[{k = n + 1}, While[ !PrimeQ[k], k++ ]; k]; p = 1; Do[ If[ Mod[p = NextPrim[p], n] == n - 2, Print[n]], {n, 1, 10^9}]

PROG

(PARI) for(i=1, 10^9, if(Mod(prime(i), i)==-2, print1(i, ", ")));

CROSSREFS

Cf. A023144, A045924, A092045, A092046, A092047, A092048, A092049, A092050, A092051, A092052.

Cf. A105290.

Sequence in context: A338416 A034196 A236173 * A156149 A258402 A006975

Adjacent sequences: A092041 A092042 A092043 * A092045 A092046 A092047

KEYWORD

nonn

AUTHOR

Robert G. Wilson v, Feb 18 2004

EXTENSIONS

Corrected by Mohammed Bouayoun (bouyao(AT)wanadoo.fr), Feb 20 2004

a(7)-a(12) from Robert G. Wilson v, Feb 22 2006

a(13)-a(19) from Giovanni Resta, Feb 23 2020

STATUS

approved