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A060377 Pepin's test numbers. 1
3, 9, 6561, 11790184577738583171520872861412518665678211592275841109096961 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,1

REFERENCES

See web page for references.

LINKS

Table of n, a(n) for n=0..3.

C. K. Caldwell, Pepin's Test

FORMULA

3^((Fn-1)/2) where Fn is a Fermat number (A000215).

EXAMPLE

a(1) = 3^((F1-1)/2) = 3^((5-1)/2) = 3^2 = 9.

CROSSREFS

Sequence in context: A060712 A122463 A072005 * A255503 A027896 A116620

Adjacent sequences:  A060374 A060375 A060376 * A060378 A060379 A060380

KEYWORD

nonn

AUTHOR

Jason Earls, Apr 02 2001

EXTENSIONS

Next two numbers have 15634 and 1024610092 digits respectively.

Corrected offset, formula and example Harry J. Smith, Jul 04 2009

STATUS

approved

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Last modified January 24 13:48 EST 2022. Contains 350538 sequences. (Running on oeis4.)