A130431 - OEIS

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A130431

Complete list of all 9 numbers n such that n is equal to the number of 9's in the decimal digits of all numbers <= n.

0, 10000000000, 20000000000, 30000000000, 40000000000, 50000000000, 60000000000, 70000000000, 80000000000

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,2

LINKS

Table of n, a(n) for n=1..9.

Tanya Khovanova and Gregory Marton, Archive Labeling Sequences, arXiv:2305.10357 [math.HO], 2023. See p. 4.

EXAMPLE

a(5)=40000000000 because the number of 9's in the decimal digits of the numbers from 0 to 40000000000 is 40000000000 and this is the 5th such number.

CROSSREFS

Cf. A014778 for proof these sequences are finite; Also A101639, A101640, A101641, A130427, A130428, A130429, A130430; Cf. A130432 for the number of numbers in these sequences.

Sequence in context: A055619 A057072 A130427 * A017182 A017278 A017518

Adjacent sequences: A130428 A130429 A130430 * A130432 A130433 A130434

KEYWORD

base,fini,nonn,full

AUTHOR

Graeme McRae, May 26 2007

STATUS

approved