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

 

Logo

The OEIS Foundation is grateful to everyone who made a donation during our Annual Appeal.     Visit the new and spectacular Pictures from the OEIS page!

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A047871 a(n) = smallest number > a(n-1) that is not a sum of exactly one power of each of the numbers 1 through n. 1
1, 2, 4, 7, 17, 54, 358, 1859, 13911, 175164, 3480256, 97050825, 1947896985, 60119287462 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..13.

EXAMPLE

a(2)=4 because 4 is the first number >2 that is not of the form 1^i+2^j; a(3)=7 because 7 is smallest number >4 not of form 1^i+2^j+3^k.

CROSSREFS

Cf. A047870.

Sequence in context: A026775 A027238 A076894 * A103032 A215649 A259351

Adjacent sequences:  A047868 A047869 A047870 * A047872 A047873 A047874

KEYWORD

nonn,nice

AUTHOR

N. J. A. Sloane.

EXTENSIONS

More terms from David W. Wilson. Two more terms from Don Reble (djr(AT)nk.ca), Oct 27 2001

a(12) from Donovan Johnson, Oct 07 2009

a(13) from Donovan Johnson, Jul 26 2010

STATUS

approved

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

License Agreements, Terms of Use, Privacy Policy .

Last modified February 14 09:35 EST 2016. Contains 268318 sequences.