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 A080520 #22 Jul 22 2025 05:53:49 %S A080520 1,2,9,12,14,16,20,22,24,28,30,36,38,47,49,51,55,57,64,66,73,77,79,91, %T A080520 93,104,106,109,113,115,118,121,126,128,131,134,140,142,150,152,156, %U A080520 158,166,168,172,174,183,184,189,191,200,207,209,218,220,224,226,234,241 %N A080520 Positions of the letter e (or è) in the French phrase enumerating these positions, "E est la première, deuxième, neuvième, douzième, quatorzième, seizième, ... lettre dans cette phrase, où les espaces, les virgules et les traits d'union ne comptent pas.". %e A080520 . 0123456789 %e A080520 0 .Eestlapre %e A080520 1 mieredeuxi %e A080520 2 emeneuviem %e A080520 3 edouziemeq %e A080520 4 uatorzieme %e A080520 5 seiziemevi %e A080520 6 ngtiemevin %e A080520 7 gtdeuxieme %Y A080520 Cf. Aronson's sequence A005224, A080517, A080518, A080519. %K A080520 nonn,easy,word %O A080520 1,2 %A A080520 _N. J. A. Sloane_, Mar 21 2003 %E A080520 Corrected and extended by _R. J. Mathar_, Oct 01 2006 %E A080520 More terms from _Charles R Greathouse IV_, Sep 26 2008