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Search: id:A086043
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| A086043 |
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Concatenation of first n twin primes. |
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+0
2
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| 3, 35, 357, 35711, 3571113, 357111317, 35711131719, 3571113171929, 357111317192931, 35711131719293141, 3571113171929314143, 357111317192931414359, 35711131719293141435961
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OFFSET
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1,1
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COMMENT
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357111317192931414359 is the only prime in the sequence for n up to 10000.
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LINKS
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C. K. Caldwell, Twin Primes.
O. E. Pol, Determinacion geometrica de los numeros primos y perfectos.
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PROGRAM
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(PARI) concattwprb(n) = { y=3; forprime(x=5, n, if(isprime(x+2) || isprime(x-2), y=eval(concat(Str(y), Str(x))); print1(y", ") ) ) }
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CROSSREFS
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Cf. A086080, A086158.
Twin primes: A001097. Cf. A007908, A019518, A059996, A078795, A089933.
Sequence in context: A121078 A112488 A089933 this_sequence A006767 A065929 A100033
Adjacent sequences: A086040 A086041 A086042 this_sequence A086044 A086045 A086046
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KEYWORD
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easy,nonn,base,new
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AUTHOR
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Cino Hilliard (hillcino368(AT)gmail.com), Sep 08 2003
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EXTENSIONS
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Edited by njas, Jul 01 2008 at the suggestion of R. J. Mathar
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