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A217535 Least number having in its decimal representation each digit n times. 1
1023456789, 10012233445566778899, 100011222333444555666777888999, 1000011122223333444455556666777788889999, 10000011112222233333444445555566666777778888899999, 100000011111222222333333444444555555666666777777888888999999 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Alois P. Heinz, Table of n, a(n) for n = 1..100

FORMULA

a(n) ~ 10^(10n-1). See PARI code for an exact formula.

MAPLE

a:= n-> parse(cat(1, 0$n, 1$(n-1), seq(i$n, i=2..9))):

seq(a(n), n=1..10);  # Alois P. Heinz, Jun 25 2017

PROG

(PARI) A217535(n)=sum(d=1, 9, 10^(n-(d==1))\9*d*10^(n*(9-d)))+10^(10*n-1)

CROSSREFS

Cf. A050278, A051018, A049363, A074205, A154566, A204047, A020666, A020667, A061604, A180489.

A subsequence of A171102.

Sequence in context: A051018 A020667 A154566 * A180489 A204047 A051264

Adjacent sequences:  A217532 A217533 A217534 * A217536 A217537 A217538

KEYWORD

nonn,base,easy

AUTHOR

M. F. Hasler, Oct 05 2012

STATUS

approved

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Last modified April 12 03:14 EDT 2021. Contains 342912 sequences. (Running on oeis4.)