A074281 Primes of the form Lucas(2*n)/3.

41, 281, 90481, 29134601, 3020733700601, 313195711516578281, 5280544535667472291277149119296546201, 547497418496144666543167613835090178297001

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: A140013 A342299 A167741 * A090833 A201043 A364269

Adjacent sequences: A074278 A074279 A074280 * A074282 A074283 A074284

Keyword

nonn

Author

Shane Findley, Sep 21 2002

Status

approved