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A031098 Write n in base 9, then complement each digit (d -> 8-d) and juxtapose. 1
7, 6, 5, 4, 3, 2, 1, 0, 7, 8, 7, 7, 7, 6, 7, 5, 7, 4, 7, 3, 7, 2, 7, 1, 7, 0, 6, 8, 6, 7, 6, 6, 6, 5, 6, 4, 6, 3, 6, 2, 6, 1, 6, 0, 5, 8, 5, 7, 5, 6, 5, 5, 5, 4, 5, 3, 5, 2, 5, 1, 5, 0, 4, 8, 4, 7, 4, 6, 4, 5, 4, 4, 4, 3, 4, 2, 4, 1, 4, 0, 3, 8, 3, 7, 3, 6, 3, 5, 3, 4 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

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

MATHEMATICA

8 - Flatten[ IntegerDigits[ Range@50, 9]] (* Robert G. Wilson v, Jul 01 2014 *)

CROSSREFS

Sequence in context: A022963 A023449 A307338 * A004448 A284807 A309909

Adjacent sequences:  A031095 A031096 A031097 * A031099 A031100 A031101

KEYWORD

nonn,base

AUTHOR

Clark Kimberling

STATUS

approved

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Last modified March 28 05:22 EDT 2020. Contains 333073 sequences. (Running on oeis4.)