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 A357391 #7 Sep 26 2022 20:16:36 %S A357391 1,64,730,8755,12734,8419585 %N A357391 a(n) is the start of the least run of exactly n consecutive positive integers with strictly decreasing values of A071626, or -1 if no such run exists. %C A357391 a(n) is the least number k such that A071626(k) > A071626(k+1) > ... > A071626(k+n-1), but A071626(k-1) <= A071626(k) if k>1 and A071626(k+n-1) <= A071626(k+n). %e A357391 a(2) = 64 since A071626(64) = 9 > A071626(65) = 8, and A071626(63) = A071626(66) = 9, and 64 is the least number with this property. %Y A357391 Cf. A071626, A342091, A357389, A357390. %K A357391 nonn,hard,more %O A357391 1,2 %A A357391 _Amiram Eldar_, Sep 26 2022