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A217535
Least number having in its decimal representation each digit n times.
1
1023456789, 10012233445566778899, 100011222333444555666777888999, 1000011122223333444455556666777788889999, 10000011112222233333444445555566666777778888899999, 100000011111222222333333444444555555666666777777888888999999
OFFSET
1,1
LINKS
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
KEYWORD
nonn,base,easy
AUTHOR
M. F. Hasler, Oct 05 2012
STATUS
approved