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 A001417 M1901 N0750 #42 Jul 08 2025 16:26:18 %S A001417 1,2,8,96,4608,798720,361267200,362794844160 %N A001417 Number of ways of folding a 2 X 2 X ... X 2 n-dimensional map. %D A001417 N. J. A. Sloane, A Handbook of Integer Sequences, Academic Press, 1973 (includes this sequence). %D A001417 N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence). %H A001417 W. F. Lunnon, <a href="https://doi.org/10.1093/comjnl/14.1.75">Multi-dimensional map-folding</a>, Computer Journal 14 1971 75-80. %H A001417 <a href="/index/Fo#fold">Index entries for sequences obtained by enumerating foldings</a> %Y A001417 Cf. A000136, A000560, A195646, A001418. %K A001417 hard,nonn,nice,more %O A001417 0,2 %A A001417 _N. J. A. Sloane_ %E A001417 a(7) from _Sean A. Irvine_, Dec 21 2017