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 A272607 Possible single line scores, not counting multiples, in duplicate bridge. 1
 50, 70, 80, 90, 100, 110, 120, 130, 140, 150, 160, 170, 180, 190, 200, 210, 230, 240, 250, 260, 270, 280, 300, 340, 350, 360, 380, 400, 420, 430, 440, 450, 460, 470, 480, 490, 500, 510, 520, 530, 540, 550, 560, 570, 580, 590, 600, 610, 620, 630, 640, 650, 660 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Not the same as rubber bridge. The difference is in what is scored above and below "the line". There are only 204 possible scores in duplicate bridge. Multiples of ten not present: 10, 20, 30, 40, 60, 220, 290, 310, 320, 330, 370, 390, 410, 820, ..., . 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, ..., . LINKS Jonathan Vos Post and Robert G. Wilson v, Table of n, a(n) for n = 1..204 American Contract Bridge League, How to keep score Wikipedia, Bridge scoring EXAMPLE 50 is in the sequence because if opponents, "They", bid something and are down by one, "We" score 50. 70 is in the sequence because if "We" bid one minor suit, either Clubs or Diamonds, "We" score 70. 100 is possible three different ways: Down one vulnerable, down one not vulnerable doubled and down two not vulnerable. CROSSREFS Cf. A114959. Sequence in context: A180103 A102803 A224559 * A224552 A039473 A309123 Adjacent sequences:  A272604 A272605 A272606 * A272608 A272609 A272610 KEYWORD easy,fini,full,nonn AUTHOR Jonathan Vos Post and Robert G. Wilson v, Nov 09 2016 STATUS approved

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Last modified December 6 13:24 EST 2021. Contains 349563 sequences. (Running on oeis4.)