login
This site is supported by donations to The OEIS Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A078514 Smallest prime = largest exponent in n factorization. 1
4, 12, 18, 20, 27, 28, 36, 44, 50, 52, 60, 68, 76, 84, 90, 92, 98, 100, 116, 124, 126, 132, 135, 140, 148, 150, 156, 164, 172, 180, 188, 189, 196, 198, 204, 212, 220, 228, 234, 236, 242, 244, 252, 260, 268, 276, 284, 292, 294, 297, 300, 306, 308, 316, 332, 338 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Harvey P. Dale, Table of n, a(n) for n = 1..1000

EXAMPLE

126 = 2*3^2*7 minimum prime is 2, largest exponent is also 2, hence 126 is in the sequence

MATHEMATICA

spleQ[n_]:=Module[{f=FactorInteger[n]}, f[[1, 1]]==Max[f[[All, 2]]]]; Select[ Range[2, 400], spleQ] (* Harvey P. Dale, Aug 19 2017 *)

CROSSREFS

Sequence in context: A303795 A175704 A111371 * A230628 A074285 A301252

Adjacent sequences:  A078511 A078512 A078513 * A078515 A078516 A078517

KEYWORD

nonn

AUTHOR

Benoit Cloitre, Jan 06 2003

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 | More pages
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified October 17 01:09 EDT 2018. Contains 316275 sequences. (Running on oeis4.)