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Search: id:A108842
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| A108842 |
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Primes such that the outer 2 digits are n and all inner digits are 5, where 0 < n < 9. |
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+0
1
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| 151, 353, 757, 15551, 75557, 355555553, 75555555557, 155555555555555555551, 755555555555555555557, 75555555555555555555557, 155555555555555555555555555555551
(list; graph; listen)
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OFFSET
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1,1
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COMMENT
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These primes are palindromic.
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PROGRAM
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(PARI) n10np1(n, d) = { local(x, y, k); for(x=1, n, for(k=1, 8, y=10^(x+1)*k+floor(10^x*d/9)*10+k; if(isprime(y), print1(y", ")) ) ) }
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CROSSREFS
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Sequence in context: A031893 A118494 A140022 this_sequence A078858 A078967 A089317
Adjacent sequences: A108839 A108840 A108841 this_sequence A108843 A108844 A108845
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KEYWORD
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easy,nonn,base
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AUTHOR
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Cino Hilliard (hillcino368(AT)gmail.com), Jul 11 2005
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