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A088554 Primes of the form (5^x-1)/4 or (5^x+3)/4. 0
2, 7, 31, 157, 3907, 19531, 2441407, 12207031, 61035157, 305175781, 9313225746154785157, 177635683940025046467781066894531 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..12.

CROSSREFS

Sequence in context: A181066 A325452 A030945 * A107595 A193320 A030882

Adjacent sequences:  A088551 A088552 A088553 * A088555 A088556 A088557

KEYWORD

nonn

AUTHOR

Cino Hilliard, Nov 17 2003

EXTENSIONS

Edited by Don Reble, May 03 2006

STATUS

approved

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Last modified August 25 09:58 EDT 2019. Contains 326324 sequences. (Running on oeis4.)