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Search: id:A100706
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| 1, 111, 11111, 1111111, 111111111, 11111111111, 1111111111111, 111111111111111, 11111111111111111, 1111111111111111111, 111111111111111111111, 11111111111111111111111
(list; graph; listen)
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OFFSET
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0,2
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FORMULA
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1 repeated 2n+1 times.
O.g.f.: (1+10x)/[(-1+x)(-1+100x)]. - R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Apr 03 2008
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MAPLE
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seq((10^(2*n+1) - 1)/9, n=0..15); (C. Ronaldo)
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CROSSREFS
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Sequence in context: A153498 A152764 A138146 this_sequence A111864 A098034 A109242
Adjacent sequences: A100703 A100704 A100705 this_sequence A100707 A100708 A100709
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KEYWORD
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nonn,easy
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AUTHOR
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N. J. A. Sloane (njas(AT)research.att.com), Nov 19 2004
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EXTENSIONS
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More terms from C. Ronaldo (aga_new_ac(AT)hotmail.com), Jan 19 2005
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