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

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A279622 Numbers with a prime factor greater than 5. 7
7, 11, 13, 14, 17, 19, 21, 22, 23, 26, 28, 29, 31, 33, 34, 35, 37, 38, 39, 41, 42, 43, 44, 46, 47, 49, 51, 52, 53, 55, 56, 57, 58, 59, 61, 62, 63, 65, 66, 67, 68, 69, 70, 71, 73, 74, 76, 77, 78, 79, 82, 83, 84, 85, 86, 87, 88, 89, 91, 92, 93, 94 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
LINKS
FORMULA
a(n) = n + O(log^3 n). - Charles R Greathouse IV, Dec 22 2016
MATHEMATICA
fQ[n_]:=!PowerMod[30, n, n] == 0; Select[Range[100], fQ]
Select[Range[100], Max[FactorInteger[#][[;; , 1]]]>5&] (* Harvey P. Dale, Feb 28 2023 *)
PROG
(PARI) isok(n) = vecmax(factor(n)[, 1]) > 5; \\ Michel Marcus, Dec 21 2016
(PARI) is(n)=if(n<7, return(0)); n>>=valuation(n, 2); n/=3^valuation(n, 2) * 5^valuation(n, 5); n>1 \\ Charles R Greathouse IV, Dec 22 2016
(Magma) [n: n in [1..100] | not PrimeDivisors(n) subset [2, 3, 5]]; // Vincenzo Librandi, Jan 29 2017
CROSSREFS
Complement of A051037.
Cf. A059485.
Sequence in context: A091901 A072823 A110547 * A247819 A051660 A364562
KEYWORD
nonn,easy
AUTHOR
Vincenzo Librandi, Dec 21 2016
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.

License Agreements, Terms of Use, Privacy Policy. .

Last modified March 29 06:44 EDT 2024. Contains 371265 sequences. (Running on oeis4.)