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, 2, 4, 7, 17, 54, 358, 1859, 13911, 175164, 3480256, 97050825, 1947896985, 60119287462

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: A382348 A342538 A076894 * A290877 A103032 A215649

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, Oct 27 2001

a(12) from Donovan Johnson, Oct 07 2009

a(13) from Donovan Johnson, Jul 26 2010

Status

approved