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A108830
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Primes such that the outer 2 digits are n and n-1 and all inner digits are 2, where 0 < n < 9.
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827, 2221, 42223, 4222222223, 42222222223, 222222222222222221, 822222222222222222227, 42222222222222222222222222222223, 8222222222222222222222222222222227
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,1
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PROG
| (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
| Sequence in context: A143799 A046496 A102350 * A134726 A104281 A179169
Adjacent sequences: A108827 A108828 A108829 * A108831 A108832 A108833
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KEYWORD
| easy,nonn,base
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AUTHOR
| Cino Hilliard (hillcino368(AT)gmail.com), Jul 11 2005
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