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 A006662 M4921 #27 Jun 28 2017 15:17:16 %S A006662 14,14,36,57,155,316,902,2053,6059,14810,44842,115009,355293,943860, %T A006662 2963536,8086913,25733325,71725012,230811370,654472364,2126296860, %U A006662 6115504594,20032488714,58309793101 %N A006662 Number of meanders in which first bridge is 7. %D A006662 S. K. Lando and A. K. Zvonkin "Plane and projective meanders", Séries Formelles et Combinatoire Algébrique. Laboratoire Bordelais de Recherche Informatique, Université Bordeaux I, 1991, pp. 287-303. %D A006662 N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence). %H A006662 S. K. Lando and A. K. Zvonkin , <a href="/A005316/a005316_1.pdf">Plane and projective meanders</a>, Séries Formelles et Combinatoire Algébrique. Laboratoire Bordelais de Recherche Informatique, Université Bordeaux I, 1991, pp. 287-303. (Annotated scanned copy) %Y A006662 Cf. A259974, A005316. %K A006662 nonn %O A006662 7,1 %A A006662 _Simon Plouffe_ %E A006662 Offset corrected, terms a(19)-a(30) added, _Andrew Howroyd_, Dec 15 2015