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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
OFFSET
1,3
COMMENTS
Larger values not certified prime.
EXAMPLE
a(5)=377 because 1000-377 = 623 and 377623 is a prime.
CROSSREFS
Cf. A084621.
Sequence in context: A108716 A358950 A271570 * A120603 A336578 A285380
KEYWORD
base,nonn
AUTHOR
Jason Earls, Jun 01 2003
STATUS
approved