OFFSET
0,2
COMMENTS
From a(16173532) = 123456798 on, the sequence becomes constant.
From a(324) = 2798 + 6 = 2804 on, this sequence becomes equal to sequence A260263, which has the same definition except for starting with a(1) = 1.
a(10^k) = 9, 89, 874, 8598, 84284, 823330, 8010205, 77737463, 123456798, ...
LINKS
M. F. Hasler, Table of n, a(n) for n = 0..1000
E. Angelini, Add the biggest absent digit, SeqFan list, Jul 21, 2015
MATHEMATICA
NestList[#+Max[Complement[Range[0, 9], IntegerDigits[#]]]&, 0, 60] (* Harvey P. Dale, May 17 2019 *)
PROG
(PARI) {L=0; a=0; d=vector(9, d, d); for(n=0, 1000, n>=L&&print1(a", ")+L*=10; a+=vecmax(setminus(d, Set(digits(a)))))} \\ Set L=1 to list only a(10^k).
CROSSREFS
KEYWORD
nonn,base
AUTHOR
Eric Angelini and M. F. Hasler, Jul 21 2015
STATUS
approved