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 A324310 #17 Sep 05 2019 05:13:59
%S A324310 2,3,2505,64486,113413,205365,423414,496156,635053,664033,881565,
%T A324310 1011793,1190685,1306605,1442136,1923655,1947766,2286913,2324422,
%U A324310 2465805,3030733,3291553,3335205,4100086,4547353,4648965,4987065,5025705,5034904,5069113,5827485,5909413
%N A324310 Numbers k such that s(k) = s(k+1) = s(k+2) where s(k) is the sum of divisors of k that are smaller than sqrt(k) (A070039).
%C A324310 Are there 4 consecutive numbers with the same value of A070039, apart from 2, 3, 4, 5?
%C A324310 The next 4 consecutive numbers with the same value of A070039 start at 1190499411. - _Giovanni Resta_, Sep 05 2019
%e A324310 2 is in the sequence since A070039(2) = A070039(3) = A070039(4) = 1.
%t A324310 s[n_] := DivisorSum[n, # &, # < Sqrt[n] &]; seq={}; s1 = 0; s2=0; Do[s3 = s[n]; If[s1 == s2 && s2 == s3, AppendTo[seq, n - 2]]; s1 = s2; s2 = s3, {n, 2, 10^5}]; seq
%Y A324310 Cf. A070039, A324295, A325175.
%K A324310 nonn
%O A324310 1,1
%A A324310 _Amiram Eldar_, Sep 03 2019