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 A272607 #20 Nov 27 2016 21:22:23 %S A272607 50,70,80,90,100,110,120,130,140,150,160,170,180,190,200,210,230,240, %T A272607 250,260,270,280,300,340,350,360,380,400,420,430,440,450,460,470,480, %U A272607 490,500,510,520,530,540,550,560,570,580,590,600,610,620,630,640,650,660 %N A272607 Possible single line scores, not counting multiples, in duplicate bridge. %C A272607 Not the same as rubber bridge. The difference is in what is scored above and below "the line". %C A272607 There are only 204 possible scores in duplicate bridge. %C A272607 Multiples of ten not present: 10, 20, 30, 40, 60, 220, 290, 310, 320, 330, 370, 390, 410, 820, ..., . %C A272607 a(i) can be made k ways: 1, 1, 1, 3, 3, 5, 2, 4, 5, 7, 2, 7, 6, 4, 7, 2, 5, 3, 1, 4, 2, 2, 3, 2, ..., . %H A272607 Jonathan Vos Post and Robert G. Wilson v, <a href="/A272607/b272607.txt">Table of n, a(n) for n = 1..204</a> %H A272607 American Contract Bridge League, <a href="http://www.acbl.org/learn_page/how-to-play-bridge/how-to-keep-score/">How to keep score</a> %H A272607 Wikipedia, <a href="https://en.wikipedia.org/wiki/Bridge_scoring">Bridge scoring</a> %e A272607 50 is in the sequence because if opponents, "They", bid something and are down by one, "We" score 50. %e A272607 70 is in the sequence because if "We" bid one minor suit, either Clubs or Diamonds, "We" score 70. %e A272607 100 is possible three different ways: Down one vulnerable, down one not vulnerable doubled and down two not vulnerable. %Y A272607 Cf. A114959. %K A272607 easy,fini,full,nonn %O A272607 1,1 %A A272607 _Jonathan Vos Post_ and _Robert G. Wilson v_, Nov 09 2016