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!)
 A107835 Slowest increasing sequence where a(n)-(first digit of a(n)) is prime. 1
 12, 14, 18, 21, 25, 32, 34, 41, 45, 47, 52, 58, 65, 67, 74, 78, 81, 87, 92, 98, 102, 104, 108, 110, 114, 128, 132, 138, 140, 150, 152, 158, 164, 168, 174, 180, 182, 192, 194, 198, 201, 213, 225, 229, 231, 235, 241, 243, 253, 259, 265, 271, 273, 279, 283, 285 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS EXAMPLE 12 - 1 = 11, which is prime; 14 - 1 = 13, which is prime; 18 - 1 = 17, which is prime; 21 - 2 = 19, which is prime; 25 - 2 = 23, which is prime; etc. MATHEMATICA Select[ Range[300], PrimeQ[ # - IntegerDigits[ # ][[1]]] &] (* Robert G. Wilson v, Jun 14 2005 *) CROSSREFS Cf. A107836. Sequence in context: A135770 A091989 A078417 * A257966 A255842 A229966 Adjacent sequences:  A107832 A107833 A107834 * A107836 A107837 A107838 KEYWORD base,easy,nonn AUTHOR Eric Angelini, Jun 11 2005 EXTENSIONS Edited, corrected and extended by Robert G. Wilson v, Jun 14 2005 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 15 20:00 EST 2019. Contains 330000 sequences. (Running on oeis4.)