This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A182750 #36 Jun 01 2024 21:42:22 %S A182750 1,0,0,0,0,0,0,99999992,998117649,0,25937424601,999999999924,0,0,0, %T A182750 9999999999999872,0,999999999999999252,0,99999999999999999440,0,0,0, %U A182750 999999999999999999999456,9999450940359923567250625,0,999999999997420003910299449,9999999999999999999999972416,0,0,0 %N A182750 a(n) = the largest multiple of n with n digits and exactly n divisors; a(n) = 0 if no such number exists. %C A182750 Conjecture: a(n) > 0 for all nonsquarefree n except for n = 4. - _Jon E. Schoenfield_, Jun 01 2024 %F A182750 A000005(a(n)) = n if a(n) > 0. %F A182750 a(n) >= A182749(n). %Y A182750 Cf. A000005, A073904, A182749. %K A182750 nonn,base %O A182750 1,8 %A A182750 _Jaroslav Krizek_, Nov 27 2010 %E A182750 More terms from _Harvey P. Dale_, Mar 02 2018 %E A182750 a(24)-a(25) and a(27) from _Michael S. Branicky_, May 26 2024 %E A182750 a(26), a(28) added, and a(16), a(18), a(20) corrected by _Jon E. Schoenfield_, May 26 2024 %E A182750 a(29)-a(31) from _David A. Corneth_, May 27 2024