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 A308525 #25 Jul 21 2021 22:49:59 %S A308525 7,13,14,24,25,26,27,44,45,46,47,48,49,50,51,81,82,83,84,85,86,87,88, %T A308525 89,90,91,92,93,94,95,149,150,151,152,153,154,155,156,157,158,159,160, %U A308525 161,162,163,164,165,166,167,168,169,170,171,172,173,174,175,176 %N A308525 Quasiperiods of the ternary tribonacci sequence (A080843). %C A308525 A word x is a quasiperiod of another (possibly infinite) word w if you can cover all of the symbols of w by translates of x. %H A308525 H. Mousavi and J. Shallit, <a href="https://doi.org/10.1007/978-3-319-23660-5_15">Mechanical Proofs of Properties of the Tribonacci Word</a>, In: Manea F., Nowotka D. (eds) Combinatorics on Words. WORDS 2015. Lecture Notes in Computer Science, vol 9304. Springer, 2015, pp. 170-190. %Y A308525 Cf. A080843. %K A308525 nonn %O A308525 1,1 %A A308525 _Jeffrey Shallit_, Jun 11 2019