Numbers k for which 10k+1, 10k+3, 10k+7, 10k+9, 10k+13 and 10k+19 are primes.

Terms

a(0) =1a(1) =148a(2) =16570a(3) =32614a(4) =66109a(5) =102250a(6) =106870a(7) =124636a(8) =146140a(9) =191773a(10) =305887a(11) =415591a(12) =421828a(13) =552700a(14) =834415a(15) =1013440a(16) =1176505a(17) =1190050a(18) =1306432a(19) =1572082a(20) =1576009a(21) =1850437a(22) =1873684a(23) =1912954a(24) =1921144a(25) =2004997a(26) =2103613a(27) =2376340