This site is supported by donations to The OEIS Foundation.

 Please make a donation to keep the OEIS running. We are now in our 55th year. In the past year we added 12000 new sequences and reached 8000 citations (which often say "discovered thanks to the OEIS"). We need to raise money to hire someone to manage submissions, which would reduce the load on our editors and speed up editing. Other ways to donate

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A157175 Primes such that sum of first digit and smallest digit is a prime. 1
 11, 13, 17, 19, 41, 43, 61, 83, 113, 127, 131, 137, 139, 149, 151, 157, 163, 167, 173, 179, 181, 191, 193, 197, 199, 211, 241, 251, 271, 281, 307, 419, 421, 431, 433, 439, 443, 461, 463, 491, 503, 509, 523, 613, 617, 619, 631, 641, 659, 661, 691, 701, 709 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS EXAMPLE 11(1+1=2=prime), 13(1+1=2=prime), 17(1+1=2=prime), 19(1+1=2=prime), 41(4+1=5=prime), 43(4+3=7=prime), etc. CROSSREFS Cf. A000040. Sequence in context: A271367 A226217 A275058 * A132244 A262731 A087201 Adjacent sequences:  A157172 A157173 A157174 * A157176 A157177 A157178 KEYWORD nonn,base,less AUTHOR Juri-Stepan Gerasimov, Feb 24 2009 EXTENSIONS 197 and 241 inserted by R. J. Mathar, Feb 26 2009 STATUS approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified December 5 13:26 EST 2019. Contains 329751 sequences. (Running on oeis4.)