A104044 Numbers k such that 10*k + 7 is prime and k is a multiple of ten.

0, 10, 30, 60, 90, 130, 160, 190, 220, 270, 330, 340, 360, 390, 400, 450, 510, 540, 550, 580, 600, 660, 690, 720, 730, 750, 760, 790, 870, 880, 900, 990, 1000, 1060, 1180, 1200, 1210, 1290, 1300, 1380, 1390, 1410, 1420, 1440, 1510

Offset

1,2

Links

Table of n, a(n) for n=1..45.

Example

If t=10, then 10*t + 7 = 107 (prime).
If t=220, then 10*t + 7 = 2207 (prime).
If t=450, then 10*t + 7 = 4507 (prime).

Mathematica

Select[10 Range[0, 500], PrimeQ[10#+7]&] (* Harvey P. Dale, Dec 09 2010 *)

Crossrefs

Sequence in context: A124164 A318624 A255601 * A124080 A345285 A344333

Adjacent sequences: A104041 A104042 A104043 * A104045 A104046 A104047

Keyword

base,nonn

Author

Parthasarathy Nambi, Mar 01 2005

Extensions

More terms from Harvey P. Dale, Dec 09 2010

a(1)=0 inserted by Georg Fischer, Jan 03 2021

Status

approved