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

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A071929 Sum of exponents = largest prime factor; a(1)=1. 0
1, 4, 12, 18, 27, 80, 120, 180, 200, 270, 300, 405, 448, 450, 500, 672, 675, 750, 1008, 1120, 1125, 1250, 1512, 1568, 1680, 1875, 2268, 2352, 2520, 2800, 3125, 3402, 3528, 3780, 3920, 4200, 5103, 5292, 5488, 5670, 5880, 6300, 7000, 7938, 8232, 8505, 8820 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..47.

EXAMPLE

28160 is here since 28160 = 2^9.5^1.11^1 and 9+1+1 = 11 and Lpf(28160)=11.

CROSSREFS

Sequence in context: A057311 A063679 A075867 * A008037 A301251 A062859

Adjacent sequences:  A071926 A071927 A071928 * A071930 A071931 A071932

KEYWORD

nonn

AUTHOR

Jason Earls, Jun 14 2002

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.

License Agreements, Terms of Use, Privacy Policy. .

Last modified February 20 21:07 EST 2019. Contains 320348 sequences. (Running on oeis4.)