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Search: id:A108836
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| A108836 |
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Primes such that the outer 2 digits are n and n-1 and all inner digits are 8, where 0 < n < 9. |
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+0
1
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| 281, 887, 8887, 48883, 888887, 888888887, 48888888883, 888888888887, 2888888888881, 4888888888883, 48888888888883, 2888888888888888888888888881, 48888888888888888888888888888888888888883
(list; graph; listen)
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OFFSET
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1,1
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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-1; if(isprime(y), print1(y", ")) ) ) }
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CROSSREFS
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Sequence in context: A163184 A122710 A161191 this_sequence A142937 A081424 A142699
Adjacent sequences: A108833 A108834 A108835 this_sequence A108837 A108838 A108839
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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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