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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

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Last modified July 23 18:47 EDT 2017. Contains 289690 sequences.