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 A068891 #6 Mar 23 2024 03:28:16 %S A068891 1,4,125,81 %N A068891 a(1) = 1; a(n) = smallest nontrivial n-th power with property that digits alternate in parity individually as well as in concatenation with previous terms. %C A068891 Conjecture: the sequence is finite. %C A068891 Certainly finite because a(10) does not exist (see A068890). - _Sean A. Irvine_, Mar 22 2024 %Y A068891 Cf. A068890. %K A068891 base,fini,nonn %O A068891 1,2 %A A068891 _Amarnath Murthy_, Mar 20 2002