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A081546 Smallest prime which is 1 more than the product of n (not necessarily distinct) composite numbers. 3
2, 5, 17, 97, 257, 3457, 12289, 40961, 65537, 786433, 5308417, 14155777, 104857601, 167772161, 1811939329, 3221225473, 24159191041, 77309411329, 206158430209, 2061584302081, 2748779069441, 6597069766657, 39582418599937 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,1

LINKS

Table of n, a(n) for n=0..22.

EXAMPLE

a(0) = 1 + 1 = 2, a(3) = 4*4*6 + 1 = 97.

CROSSREFS

Cf. A081545.

Sequence in context: A059248 A203006 A143878 * A103511 A254132 A161609

Adjacent sequences:  A081543 A081544 A081545 * A081547 A081548 A081549

KEYWORD

hard,nonn

AUTHOR

Amarnath Murthy, Apr 01 2003

EXTENSIONS

More terms from Michel ten Voorde Jun 13 2003

Added missing term 12289 and a(13)-a(22) from Donovan Johnson, Nov 05 2009

STATUS

approved

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Last modified May 31 09:30 EDT 2020. Contains 334748 sequences. (Running on oeis4.)