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 A380225 #13 Jan 22 2025 18:27:40 %S A380225 21,32,43,52,74,91,112,133,147,161,162,184,211,212,242,243,273,308, %T A380225 343,381,422,463,464,508,509,553,554,602,651,652,653,678,704,758,759, %U A380225 760,761,813,814,815,816,820,821,822,828,872,873,931,932,938,966,998 %N A380225 Numbers k > 0 such that both |b(k) - b(k-1)| and |b(k+1) - b(k)| are greater than 1, where b is A377091. %H A380225 Paolo Xausa, <a href="/A380225/b380225.txt">Table of n, a(n) for n = 1..1000</a> %F A380225 A377091(a(n)) = A380224(n). %Y A380225 Cf. A377091, A379880, A380223, A380224. %K A380225 nonn %O A380225 1,1 %A A380225 _Paolo Xausa_, Jan 18 2025