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 A386911 #12 Aug 08 2025 06:38:14 %S A386911 14,14229,194931,8897930,278110142 %N A386911 Numbers k such that A064945(k) = A064945(k+1). %C A386911 No other terms up to 10^9. %t A386911 A064945[n_] := Total[#*Range[Length[#], 1, -1]] & [Divisors[n]];q[n_]:=A064945[n]==A064945[n+1];Select[Range[200000],q[#]&] (* _James C. McMahon_, Aug 07 2025 *) %Y A386911 Cf. A064945. %K A386911 nonn,more %O A386911 1,1 %A A386911 _Michel Marcus_, Aug 07 2025