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A068646
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Primes in which a string of 5's is sandwiched between two 1's.
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5
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OFFSET
| 1,1
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EXAMPLE
| 11 is also a member in which a string of 0 5's is there between two one's.
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MAPLE
| a := 1:b := 5:i := 1:for n from 0 to 500 do c := a+10*(10^n-1)/9*b+10^(n+1)*a; if(isprime(c)) then d[i] := c; i := i+1; end if; end do:q := seq(d[j], j=1..i-1);
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CROSSREFS
| Cf. A068645.
Sequence in context: A038141 A142083 A205085 * A176365 A077577 A157186
Adjacent sequences: A068643 A068644 A068645 * A068647 A068648 A068649
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KEYWORD
| base,nonn
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AUTHOR
| Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Feb 28 2002
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EXTENSIONS
| More terms from Sascha Kurz (sascha.kurz(AT)uni-bayreuth.de), Mar 19 2002. The next term is too big to include.
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