A038525 Numbers n with property that either the n-th Fibonacci number is prime or the concatenation of its prime factors is prime.

3, 4, 5, 7, 8, 11, 13, 17, 23, 24, 28, 29, 34, 43, 47, 50, 52, 58, 71, 77, 83, 131, 137, 163, 197, 235, 238, 319, 359, 431, 433, 449, 509, 569, 570, 571, 669, 949, 958, 1211, 1305

Offset

1,1

Comments

Up to and including a(17)=52, the sequence are the n such that A038526(n) is prime. Extrapolating, one would expect it to continue 83,86,93,95,131,137,139,174,182,... - R. J. Mathar, Oct 12 2007

Links

Table of n, a(n) for n=1..41.

Crossrefs

Cf. A000045, A037276, A038526.

Sequence in context: A270342 A066542 A003310 * A268678 A057201 A242965

Adjacent sequences: A038522 A038523 A038524 * A038526 A038527 A038528

Keyword

nonn,base,more

Author

Jeff Burch

Extensions

More terms from Thomas Baruchel, Oct 11 2003

More terms from Sean A. Irvine, Jan 16 2021

Status

approved