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A138918 Numbers n such that 18n-1 is prime. 2
1, 3, 4, 5, 6, 10, 11, 13, 14, 15, 20, 24, 25, 26, 28, 29, 31, 33, 36, 38, 39, 40, 43, 45, 46, 48, 49, 53, 54, 59, 61, 64, 66, 68, 70, 71, 76, 80, 83, 84, 88, 89, 90, 91, 95, 104, 105, 106, 110, 111, 115, 116, 119, 123, 126, 130, 131, 133, 134, 136, 144, 145, 148, 150 (list; graph; refs; listen; history; internal format)
OFFSET

1,2

COMMENTS

Corresponding primes are in A061242.

LINKS

Zak Seidov, Table of n, a(n) for n = 1..1000.

MATHEMATICA

Select[Range[200], PrimeQ[18#-1]&]  (* From Harvey P. Dale, Mar 09 2011 *)

CROSSREFS

Cf. A061242.

Sequence in context: A059877 A047307 A179774 * A071186 A174057 A164977

Adjacent sequences:  A138915 A138916 A138917 * A138919 A138920 A138921

KEYWORD

nonn

AUTHOR

Zak Seidov (zakseidov(AT)yahoo.com), Apr 03 2008

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Last modified February 16 06:44 EST 2012. Contains 205864 sequences.