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A097521 Difference between F(n) and nextprime(F(n)) where F(n) is the n-th Fermat Number. 0
2, 2, 2, 6, 2, 14, 12, 50, 296, 74, 642, 980, 1760 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,1

LINKS

Table of n, a(n) for n=0..12.

FORMULA

F(n) = 2^(2^n)+1, n=0, 1, 2...

EXAMPLE

F(5) = 4294967297. Nextprime(F(5)) = 4294967311.

4294967311 - 4294967297 = 14 the 6th entry in the table.

CROSSREFS

Sequence in context: A230940 A110512 A078020 * A081668 A126615 A158524

Adjacent sequences:  A097518 A097519 A097520 * A097522 A097523 A097524

KEYWORD

nonn

AUTHOR

Cino Hilliard, Aug 27 2004

STATUS

approved

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Last modified March 22 01:06 EDT 2019. Contains 321406 sequences. (Running on oeis4.)