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A061783
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Primes p such that p + (p reversed) is also a prime.
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3
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229, 239, 241, 257, 269, 271, 277, 281, 439, 443, 463, 467, 479, 499, 613, 641, 653, 661, 673, 677, 683, 691, 811, 823, 839, 863, 881, 20011, 20029, 20047, 20051, 20101, 20161, 20201, 20249, 20269, 20347, 20389, 20399, 20441, 20477, 20479, 20507
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,1
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LINKS
| Harry J. Smith, Table of n, a(n) for n=1,...,1000
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EXAMPLE
| 229 is a term since 229 is a prime and so is 229 + 922 = 1151.
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MATHEMATICA
| Select[Prime[Range[3000]], PrimeQ[#+FromDigits[Reverse[IntegerDigits[#]]]]&]
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PROG
| (PARI) { n=0; forprime (p=2, 86843, x=p; r=0; while (x>0, d=x-10*(x\10); x\=10; r=r*10 + d); if (isprime(p + r), write("b061783.txt", n++, " ", p)) ) } [From Harry J. Smith (hjsmithh(AT)sbcglobal.net), Jul 28 2009]
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CROSSREFS
| Sequence in context: A091551 A033528 A086002 * A140017 A119711 A062589
Adjacent sequences: A061780 A061781 A061782 * A061784 A061785 A061786
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KEYWORD
| nonn,base,easy
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AUTHOR
| Amarnath Murthy (amarnath_murthy(AT)yahoo.com), May 24 2001
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EXTENSIONS
| Corrected and extended by Patrick De Geest (pdg(AT)worldofnumbers.com), May 26 2001
Mathematica program provided by Harvey P. Dale, Nov. 27, 2010
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