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A068647
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Primes in which a string of 6's is sandwiched between two 1's.
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3
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OFFSET
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1,1
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COMMENTS
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LINKS
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EXAMPLE
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11 is also a member in which a string of 0 6's is there between two one's.
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MATHEMATICA
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Select[Table[10*FromDigits[PadRight[{1}, n, 6]]+1, {n, 60}], PrimeQ] (* Harvey P. Dale, Jun 18 2021 *)
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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