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A084620 Numbers n such that concatenation of Fibonacci n and its 10's complement is a prime. 1
1, 1, 3, 21, 377, 987, 1346269, 165580141, 591286729879, 99194853094755497, 15635695580168194910579363790217849593217, 24522987531716273545293036474970821924473060471519 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

COMMENTS

Larger values not certified prime.

LINKS

Table of n, a(n) for n=1..12.

EXAMPLE

a(5)=377 because 1000-377 = 623 and 377623 is a prime.

CROSSREFS

Cf. A084621.

Sequence in context: A101389 A108716 A271570 * A120603 A285380 A139224

Adjacent sequences:  A084617 A084618 A084619 * A084621 A084622 A084623

KEYWORD

base,nonn

AUTHOR

Jason Earls, Jun 01 2003

STATUS

approved

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Last modified August 24 22:41 EDT 2019. Contains 326314 sequences. (Running on oeis4.)