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Search: id:A068685
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| A068685 |
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Primes which are a sandwich of numbers using at most one digit between two 1's. |
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+0
4
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| 11, 101, 131, 151, 181, 191, 13331, 15551, 16661, 19991, 1333331, 1444441, 1777771, 188888881, 199999991, 1666666666661, 188888888888881, 16666666666666661, 1111111111111111111, 1666666666666666661
(list; graph; listen)
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OFFSET
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1,1
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EXAMPLE
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11 is a member sandwiching nothing between two 1's. 13331 is a sandwich using 333.
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CROSSREFS
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Cf. A068683.
Adjacent sequences: A068682 A068683 A068684 this_sequence A068686 A068687 A068688
Sequence in context: A066592 A062332 A088281 this_sequence A109830 A052035 A083144
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KEYWORD
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base,nonn
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AUTHOR
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Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Mar 02 2002
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EXTENSIONS
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More terms from Sascha Kurz (sascha.kurz(AT)uni-bayreuth.de), Mar 17 2002
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