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!)
 A100422 Numbers n such that 30*n+{1,7,11,13,17,23,29} are all prime. 2
 1, 53887, 114731, 123306, 139742, 210554, 471745, 480859, 619039, 630862, 858929, 1075873, 1306614, 1714945, 1913514, 2767458, 3014285, 3454137, 3518243, 3699151, 3864512, 3874291, 4274376, 4862362, 4878329, 4937822 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS Values are 1 mod 7. LINKS MAPLE a:= proc(n) option remember;       local m;       if n=1 then 1       else for m from 30*(a(n-1)+7) by 210            while not (isprime (m+1) and isprime (m+7) and                  isprime (m+11) and isprime (m+13) and                  isprime (m+17) and isprime (m+23) and                  isprime (m+29))            do od; m/30         fi     end: seq (a(n), n=1..10); MATHEMATICA Select[Range[5000000], And@@PrimeQ/@(30(#)+{1, 7, 11, 13, 17, 23, 29})&]  (* Harvey P. Dale, Feb 23 2011 *) PROG (MAGMA) [ n: n in [0..5000000] | forall{ q: q in [1, 7, 11, 13, 17, 23, 29] | IsPrime(30*n+q) } ]; // Klaus Brockhaus, Feb 23 2011 CROSSREFS Cf. A005776, A007775, A076205, A100418-A100423. Sequence in context: A252035 A099231 A237547 * A099010 A164723 A164720 Adjacent sequences:  A100419 A100420 A100421 * A100423 A100424 A100425 KEYWORD easy,nonn AUTHOR Ferenc Adorjan (fadorjan(AT)freemail.hu), Nov 19 2004 EXTENSIONS Edited by Don Reble, Nov 17 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 14 19:27 EST 2019. Contains 329987 sequences. (Running on oeis4.)