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A074281 Primes of the form Lucas(2*n)/3. 2
41, 281, 90481, 29134601, 3020733700601, 313195711516578281, 5280544535667472291277149119296546201, 547497418496144666543167613835090178297001 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

The next term has 96 digits. - Harvey P. Dale, Apr 29 2011.

LINKS

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

Ron Knott, The Mathematics of the Fibonacci series.

Ron Knott, Pi and the Fibonacci Numbers.

EXAMPLE

Lucas(2*5)=3*41, Lucas(2*7)=3*281, Lucas(2*13)=3*90481.

MATHEMATICA

Select[Table[LucasL[2n]/3, {n, 400}], PrimeQ]  (* Harvey P. Dale, Apr 29 2011 *)

CROSSREFS

Values of n are given in A074304.

Sequence in context: A142768 A140013 A167741 * A090833 A201043 A002646

Adjacent sequences:  A074278 A074279 A074280 * A074282 A074283 A074284

KEYWORD

nonn

AUTHOR

Shane Findley, Sep 21 2002

STATUS

approved

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Last modified September 22 08:23 EDT 2018. Contains 315270 sequences. (Running on oeis4.)