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 A340663 #5 Jan 18 2021 18:36:48 %S A340663 2,6,12,19,37,65,104,133,173,263,375,408,561,689,854,1107,1348,1534, %T A340663 1819,2062,2415,2871,3308,3695,4241,4837,5353,5995,6576,7291,8211, %U A340663 8979,9866,10880,11995,12934,14113,15326,16572,17889,19159,20663,22289,23869,25750,27361 %N A340663 a(n)^2 is the start of the first occurrence of n consecutive perfect powers, all of which are squares with exponents equal to 2 (A111245). %F A340663 a(n) = sqrt(A340661(n)). %e A340663 See A340661. %Y A340663 Cf. A000290, A001597, A111245, A340661, A340662, A340664, A340695. %K A340663 nonn %O A340663 1,1 %A A340663 _Hugo Pfoertner_, Jan 18 2021