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1, 111, 11111, 1111111, 111111111, 11111111111, 1111111111111, 111111111111111, 11111111111111111, 1111111111111111111, 111111111111111111111, 11111111111111111111111
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,2
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FORMULA
| 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
| seq((10^(2*n+1) - 1)/9, n=0..15); (C. Ronaldo)
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CROSSREFS
| Sequence in context: A153498 A152764 A138146 * A111864 A098034 A109242
Adjacent sequences: A100703 A100704 A100705 * A100707 A100708 A100709
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KEYWORD
| nonn,easy
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AUTHOR
| N. J. A. Sloane (njas(AT)research.att.com), Nov 19 2004
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EXTENSIONS
| More terms from C. Ronaldo (aga_new_ac(AT)hotmail.com), Jan 19 2005
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