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A031100 Write 2n-1 in base 9 and juxtapose. 10
1, 3, 5, 7, 1, 0, 1, 2, 1, 4, 1, 6, 1, 8, 2, 1, 2, 3, 2, 5, 2, 7, 3, 0, 3, 2, 3, 4, 3, 6, 3, 8, 4, 1, 4, 3, 4, 5, 4, 7, 5, 0, 5, 2, 5, 4, 5, 6, 5, 8, 6, 1, 6, 3, 6, 5, 6, 7, 7, 0, 7, 2, 7, 4, 7, 6, 7, 8, 8, 1, 8, 3, 8, 5, 8, 7, 1, 0, 0, 1, 0, 2, 1, 0, 4, 1, 0, 6, 1, 0 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..90.

MATHEMATICA

Table[IntegerDigits[2n-1, 9], {n, 50}]//Flatten (* Harvey P. Dale, Jul 22 2019 *)

CROSSREFS

Sequence in context: A162538 A324990 A084712 * A031057 A133069 A192327

Adjacent sequences:  A031097 A031098 A031099 * A031101 A031102 A031103

KEYWORD

nonn,base

AUTHOR

Clark Kimberling

STATUS

approved

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Last modified February 26 21:18 EST 2020. Contains 332295 sequences. (Running on oeis4.)