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A077498 Primes of the form 2^r*7^s + 1. 6
2, 3, 5, 17, 29, 113, 197, 257, 449, 1373, 3137, 50177, 65537, 114689, 268913, 470597, 614657, 1075649, 3294173, 7340033, 9834497, 210827009, 275365889, 359661569, 469762049, 1129900997, 1438646273, 1927561217, 7909306973, 52613349377 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..30.

EXAMPLE

197 = 2^2*7^2 + 1 is a member.

CROSSREFS

Cf. A005109, A077497, A077499, A077500.

Sequence in context: A214735 A216061 A029972 * A118958 A259596 A189536

Adjacent sequences:  A077495 A077496 A077497 * A077499 A077500 A077501

KEYWORD

nonn

AUTHOR

Amarnath Murthy, Nov 07 2002

EXTENSIONS

Corrected and extended by Ray Chandler, Aug 02 2003

STATUS

approved

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Last modified March 26 06:48 EDT 2019. Contains 321481 sequences. (Running on oeis4.)