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A158859 a(n) is formed by 2n+1 concatenations of the digit 2r+1 where n=r (mod 5). 1
1, 333, 55555, 7777777, 999999999, 11111111111, 3333333333333, 555555555555555, 77777777777777777, 9999999999999999999, 111111111111111111111, 33333333333333333333333 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

COMMENTS

One 1, three 3's, five 5's, seven 7's, nine 9's, eleven 1's, thirteen 3's,

LINKS

Table of n, a(n) for n=0..11.

CROSSREFS

Cf. A158849.

Sequence in context: A233030 A250835 A221827 * A182098 A331411 A020367

Adjacent sequences:  A158856 A158857 A158858 * A158860 A158861 A158862

KEYWORD

nonn,base

AUTHOR

Paul Curtz, Mar 28 2009

EXTENSIONS

Definition modified by R. J. Mathar, Apr 06 2009

STATUS

approved

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Last modified February 22 05:54 EST 2020. Contains 332116 sequences. (Running on oeis4.)