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 A348100 #11 Sep 30 2021 17:23:52 %S A348100 56347,906596,906597,1090250,1141550,1243275,4972372,5684822,6288488, %T A348100 6379748,6486325,6907974,7480447,8587249,9129248,11112173,12133672, %U A348100 12133673,13852924,14185448,17519948,19293208,19293209,19751750,20738672,21560848,21721796,21959350 %N A348100 Starts of runs of 4 consecutive numbers that have an equal number of unitary and nonunitary prime divisors (A348097). %H A348100 Amiram Eldar, <a href="/A348100/b348100.txt">Table of n, a(n) for n = 1..10000</a> %e A348100 56347 is a term since 56347 = 29^2 * 67, 56347 + 1 = 56348 = 2^2 * 14087, 56347 + 2 = 56349 = 3^3 * 2087 and 56347 + 3 = 56350 = 2 * 5^2 * 7^2 * 23 all have the same number of unitary and nonunitary prime divisors. %t A348100 q[n_] := n == 1 || Count[(e = FactorInteger[n][[;; , 2]]), 1] == Length[e]/2; v = q /@ Range[4]; seq = {}; Do[v = Append[Drop[v, 1], q[k]]; If[And @@ v, AppendTo[seq, k - 3]], {k, 5, 1.3*10^6}]; seq %Y A348100 Subsequence of A348097, A348098 and A348099. %Y A348100 Cf. A335398. %K A348100 nonn %O A348100 1,1 %A A348100 _Amiram Eldar_, Sep 30 2021