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A182029 Least odd k > a(n-1) such that 3*k*2^n-1 is a prime number. 1
1, 5, 7, 9, 15, 25, 31, 33, 35, 45, 47, 49, 59, 65, 91, 115, 127, 135, 137, 149, 165, 175, 183, 185, 217, 225, 245, 273, 279, 287, 303, 349, 359, 429, 433, 445, 457, 525, 577, 593, 599, 629, 641, 673, 675, 679, 727, 749, 775, 795, 835, 855, 973, 1049, 1087 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

As n increases a(n)/A000217(n) tends to 0.45.

LINKS

Pierre CAMI, Table of n, a(n) for n = 1..5000

CROSSREFS

Cf. A210651.

Sequence in context: A029606 A247283 A050595 * A177941 A029667 A264747

Adjacent sequences:  A182026 A182027 A182028 * A182030 A182031 A182032

KEYWORD

nonn

AUTHOR

Pierre CAMI, Apr 07 2012

STATUS

approved

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Last modified October 17 06:08 EDT 2019. Contains 328106 sequences. (Running on oeis4.)