The OEIS is supported by the many generous donors to the OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A192226 Numbers n such that all integers in the interval (n-2*sqrt(sqrt(n)), n] are composite. 3
 1, 28, 36, 96, 120, 121, 122, 123, 124, 125, 126, 146, 147, 148, 189, 190, 207, 208, 209, 210, 219, 220, 221, 222, 249, 250, 292, 302, 303, 304, 305, 306, 326, 327, 328, 329, 330, 346, 477, 478, 519, 520, 533, 534, 535, 536, 537, 538, 539, 540, 630, 672 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS a(14432) = 191913030 is probably the last term. Any further terms must be greater than 1.5 * 10^18. - Charles R Greathouse IV, Jun 30 2011 LINKS Charles R Greathouse IV, Table of n, a(n) for n = 1..14432 MATHEMATICA Select[Range[700], NextPrime[#-2Sqrt[Sqrt[#]]]>#&] (* Harvey P. Dale, Jul 27 2011 *) PROG (PARI) is(n)=for(k=0, sqrtnint(16*n-1, 4), if(isprime(n-k), return(0))); 1 \\ Charles R Greathouse IV, Aug 26 2015 CROSSREFS Cf. A188817, A189025, A008995. Sequence in context: A048023 A359529 A105710 * A323005 A080983 A179105 Adjacent sequences: A192223 A192224 A192225 * A192227 A192228 A192229 KEYWORD nonn AUTHOR Juri-Stepan Gerasimov, Jun 26 2011 EXTENSIONS a(12)-a(13) added, a(53)-a(56) corrected by Charles R Greathouse IV, Jun 30 2011 STATUS approved

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

Last modified October 2 02:56 EDT 2023. Contains 365831 sequences. (Running on oeis4.)