A084621 Numbers n such that Fibonacci(n) concatenated with its 10's complement is prime.

1, 2, 4, 8, 14, 16, 31, 41, 58, 83, 194, 238, 251, 938, 998, 1244, 2273, 2291

Offset

1,2

Comments

Larger values not certified prime.

Links

Table of n, a(n) for n=1..18.

Example

a(7)=31 because Fibonacci(31)=1346269; 10000000-1346269 = 8653731,
and 13462698653731 is prime.

Crossrefs

Cf. A084620.

Sequence in context: A069049 A124853 A188629 * A248379 A002132 A294065

Adjacent sequences: A084618 A084619 A084620 * A084622 A084623 A084624

Keyword

base,more,nonn

Author

Jason Earls, Jun 01 2003

Status

approved