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A083988
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Primes p such that concatenation p, 0, R(p) is also a prime (of course a palindromic prime).
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0
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31, 73, 139, 149, 163, 167, 173, 193, 197, 331, 347, 359, 367, 397, 719, 769, 911, 947, 967, 977, 1033, 1039, 1069, 1087, 1091, 1109, 1171, 1279, 1427, 1433, 1447, 1487, 1499, 1543, 1567, 1571, 1601, 1607, 1627, 1709, 1759, 1777, 1801, 1861, 1871, 1879
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,1
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COMMENTS
| Concatenation p and R(p) is a composite number (a multiple of 11).
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EXAMPLE
| 31 is a member as 31013 is also prime.
139 is a member as 1390931 is also a prime.
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CROSSREFS
| Sequence in context: A146353 A131633 A084655 * A070954 A141892 A155933
Adjacent sequences: A083985 A083986 A083987 * A083989 A083990 A083991
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KEYWORD
| base,nonn
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AUTHOR
| Amarnath Murthy (amarnath_murthy(AT)yahoo.com), May 22 2003
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EXTENSIONS
| More terms from David Wasserman (wasserma(AT)spawar.navy.mil), Dec 07 2004
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