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A050528 Primes of form 9*2^n+1. 1
19, 37, 73, 577, 1153, 18433, 147457, 1179649, 77309411329, 39582418599937, 79164837199873, 83010348331692982273, 332041393326771929089, 1328165573307087716353, 21760664753063325144711169, 196002643346460554954903773880698489798657 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..16.

Index entries for sequences of n such that k*2^n-1 (or k*2^n+1) is prime

CROSSREFS

For more terms see A002256.

Sequence in context: A061237 A158293 A107579 * A053685 A136063 A111441

Adjacent sequences:  A050525 A050526 A050527 * A050529 A050530 A050531

KEYWORD

nonn

AUTHOR

N. J. A. Sloane, Dec 29 1999

STATUS

approved

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Last modified April 18 22:57 EDT 2014. Contains 240734 sequences.