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 A221180 #22 Jun 27 2015 13:36:55 %S A221180 1,2,4,8,16,32,64,128,256,512,1024,2048,4096,8092,16184,32368,64736, %T A221180 129472,258944,517888,1035776,2071552,4143104,8286208,16572416, %U A221180 33144832,66289664,132579328,265158656,530317312,1060634624,2121269248,4242538496,8485076992,16970153984,33940307968 %N A221180 Erroneous version of A000079. %C A221180 Included in accordance with the OEIS policy of listing published but incorrect sequences. The entries for 2^13 on are incorrect. %H A221180 D. Huylebrouck, <a href="http://dx.doi.org/10.1007/s00283-012-9326-8">Lost in enumeration: Leonardo da Vinci's slip-ups in arithmetic and mechanics</a>, Math. Intelligencer, 34 (No. 4, 2012), 15-20. %H A221180 Leonardo da Vinci, <a href="http://ebooks.library.cornell.edu/k/kmoddl/toc_leonardo1.html">Codex Madrid I: The Madrid Codices</a>, (Facsimile Edition), McGraw-Hill, 1974. See page 75R. %Y A221180 Cf. A000079. %K A221180 nonn %O A221180 0,2 %A A221180 _N. J. A. Sloane_, Jan 13 2013