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 A327865 #7 Sep 30 2019 20:20:45
%S A327865 0,1,6,21,25,26,32,36,46,50,51,75,76,86,88,91,99,100,106,111,112,116,
%T A327865 125,126,141,146,150,156,161,166,175,192,200,201,206,209,216,221,225,
%U A327865 226,236,242,243,248,250,266,272,275,276,279,291,300,301,306,308,316,319,321,325,326,328,346,350,356,369,371,375,381
%N A327865 Numbers whose arithmetic derivative is a multiple of 5, cf. A003415.
%H A327865 Antti Karttunen, <a href="/A327865/b327865.txt">Table of n, a(n) for n = 1..10000</a>
%o A327865 (PARI)
%o A327865 A003415(n) = {my(fac); if(n<1, 0, fac=factor(n); sum(i=1, matsize(fac)[1], n*fac[i, 2]/fac[i, 1]))}; \\ From A003415
%o A327865 isA327865(n) = !(A003415(n)%5);
%o A327865 k=1; n=0; while(k<105, if(isA327865(n), print1(n, ", "); k++); n++);
%Y A327865 Cf. A003415, A235992, A327863, A327864, A327935 (a subsequence).
%K A327865 nonn
%O A327865 1,3
%A A327865 _Antti Karttunen_, Sep 30 2019