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%I #27 Feb 19 2024 04:26:46
%S 1,2,3,6,9,18,36,72,99,198,396,792,999,1998,3996,7992,9999,10989,
%T 19998,21978,39996,43956,76923,99999,199998
%N Indices of records in A004290.
%C a(n+1) <= 2*a(n) for all n >= 2.
%e 6 is a term because A004290(n) < A004290(6) for all n < 6, where A004290(n) is the least positive multiple of n that when written in base 10 uses only 0's and 1's.
%o (PARI) lista(nn) = {my(k, r=0); print1("0, "); for(n=1, nn, k=1; while(fromdigits(binary(k))%n>0, k++); if(k>r, r=k; print1(n, ", "))); } \\ _Jinyuan Wang_, May 16 2020; a(1)=0 inserted by _Georg Fischer_, Jun 24 2020
%Y Cf. A004290, A268609.
%K nonn,base,more
%O 1,2
%A _David Radcliffe_, Feb 08 2016
%E a(1)=0 inserted by _Georg Fischer_, Jun 24 2020
%E Initial 0 removed for consistency with change in A004290 by _Sean A. Irvine_, Feb 19 2024
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