A057095 Numbers n such that n^2 +1, n^2 +3, n^2 +7, n^2 +9 and n^2 +13 are simultaneously prime.

2, 10, 238850, 315410, 927070, 2525870, 2828270, 3993070, 4794520, 5617160, 6173870, 6859310, 8146100, 8294290, 9267220, 10053410, 10515340, 12720460, 15074770, 16755190, 16788580, 17525470, 21740120, 26657060, 29633510

Offset

1,1

Links

Table of n, a(n) for n=1..25.

Mathematica

Select[ Range[ 1, 5 10^7], PrimeQ[ #^2 + 1] && PrimeQ[ #^2 + 3] && PrimeQ[ #^2 + 7] && PrimeQ[ #^2 + 9] && PrimeQ[ #^2 + 13] & ]

Crossrefs

Sequence in context: A079180 A027735 A085698 * A119189 A309862 A260756

Adjacent sequences: A057092 A057093 A057094 * A057096 A057097 A057098

Keyword

nonn

Author

Robert G. Wilson v, Sep 11 2000

Status

approved