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 A165771 #13 Jun 02 2025 02:05:26 %S A165771 1,1,1,614,206,463,8435,4872,17870,1234535428,182846450,693391108, %T A165771 96110089192,205761216947625578,8024691291572288542, %U A165771 3078189274921062476618,5669380917941142205058,61952555082544875480446 %N A165771 Smallest positive integer such that a(1)+...a(n) divides 123...n (=A007908(n)). %C A165771 Without the initial term, these are the first differences of A165770. %H A165771 John W. Layman, <a href="https://web.archive.org/web/*/http://list.seqfan.eu/oldermail/seqfan/2009-September/002426.html">Re: Sum divides concatenation</a>, SeqFan list, Sep 30 2009. %o A165771 (PARI) c=""; s=0; for(i=1,19, fordiv(c=eval(Str(c,i)),d, d>s || next; print1(d-s,", "); s=d; break)) %Y A165771 Cf. A151995, A165770, A166064. %K A165771 nonn,base %O A165771 1,4 %A A165771 _M. F. Hasler_, Sep 30 2009 %E A165771 Edited by _Charles R Greathouse IV_, Apr 24 2010