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 A329909 #12 Feb 16 2025 08:33:58 %S A329909 0,0,1,15,36,135,314,588,1173,1851,2806,3433 %N A329909 Number of different four-digit proper fractions with anomalous cancellation property in base n. %C A329909 As in A329908, 0 digits or digits that appear different times in numerator and denominator are not cancelled. %D A329909 Boas, R. P. "Anomalous Cancellation," Ch. 6 in Mathematical Plums (Ed. R. Honsberger). Washington, DC: Math. Assoc. Amer., pp. 113-129, 1979. %H A329909 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/AnomalousCancellation.html">Anomalous Cancellation</a> %Y A329909 Cf. A094907 (two-digit), A329908 (three-digit). %K A329909 nonn,base,more %O A329909 2,4 %A A329909 _Xiaohan Zhang_, Nov 23 2019