A174194 10n-7 and 10n-3 are both primes.

1, 2, 5, 11, 17, 20, 23, 32, 47, 62, 65, 68, 83, 86, 89, 110, 122, 131, 143, 149, 167, 170, 179, 188, 200, 209, 221, 230, 248, 269, 284, 296, 317, 326, 335, 347, 362, 368, 380, 395, 401, 416, 452, 479, 482, 494, 524, 542, 551, 566, 593, 605, 674, 683, 725, 758

Offset

1,2

Links

Table of n, a(n) for n=1..56.

Mathematica

Select[Range[800], AllTrue[10#-{3, 7}, PrimeQ]&] (* Harvey P. Dale, May 05 2025 *)

Crossrefs

Sequence in context: A091653 A088348 A156004 * A174237 A181580 A118754

Adjacent sequences: A174191 A174192 A174193 * A174195 A174196 A174197

Keyword

nonn,easy

Author

Juri-Stepan Gerasimov, Mar 11 2010

Extensions

Corrected by Charles R Greathouse IV, Mar 21 2010

Status

approved