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A158859
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a(n) is formed by 2n+1 concatenations of the digit 2r+1 where n=r (mod 5).
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0
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1, 333, 55555, 7777777, 999999999, 11111111111, 3333333333333, 555555555555555, 77777777777777777, 9999999999999999999, 111111111111111111111, 33333333333333333333333
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,2
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COMMENTS
| One 1, three 3's, five 5's, seven 7's, nine 9's, eleven 1's, thirteen 3's,
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CROSSREFS
| Cf. A158849.
Sequence in context: A066349 A043503 A202311 * A020367 A184463 A119760
Adjacent sequences: A158856 A158857 A158858 * A158860 A158861 A158862
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KEYWORD
| nonn,base
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AUTHOR
| Paul Curtz (bpcrtz(AT)free.fr), Mar 28 2009
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EXTENSIONS
| Definition modified by R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Apr 06 2009
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