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 A077515 #9 Mar 17 2022 01:03:38 %S A077515 1,23,361,4006,0,600004,0,80000001,900060001,1000000016,0, %T A077515 120000000020,0,14000000002112,150000300946521,1600000000000005,0, %U A077515 180000000000000639,0,20000000000000000048,210000002255164326976,2200000000000000037888,0,240000000000000000000004 %N A077515 Smallest n-digit number beginning with n and having n divisors, or 0 if no such number exists. %e A077515 a(5) = 0 as 13^4 = 28561 < 50000 < 59999 < 83521 = 17^4. %Y A077515 Cf. A077516. %K A077515 base,nonn %O A077515 1,2 %A A077515 _Amarnath Murthy_, Nov 08 2002 %E A077515 More terms from _Ray Chandler_, Aug 14 2003 %E A077515 a(24) from _Jon E. Schoenfield_, Mar 17 2022