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A083989 Concatenation of prime k and its 10's complement is a prime. 2
3, 7, 17, 23, 29, 31, 41, 43, 53, 67, 71, 83, 109, 127, 139, 151, 173, 179, 197, 211, 229, 263, 271, 281, 307, 359, 463, 547, 557, 569, 587, 593, 673, 677, 683, 691, 701, 719, 727, 757, 769, 823, 839, 881, 883, 887, 907, 937, 983, 997, 1087, 1103, 1171, 1181 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..54.

EXAMPLE

43 belongs to this sequence as 4357 is also a prime.

CROSSREFS

Cf. A083990.

Sequence in context: A181420 A254680 A018411 * A152451 A097958 A118940

Adjacent sequences:  A083986 A083987 A083988 * A083990 A083991 A083992

KEYWORD

base,nonn

AUTHOR

Amarnath Murthy, May 23 2003

EXTENSIONS

More terms from Jason Earls (zevi_35711(AT)yahoo.com), Jun 01 2003

STATUS

approved

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Last modified August 29 04:48 EDT 2015. Contains 261184 sequences.