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4, 14, 23, 34, 42, 50, 59, 66, 72, 79, 86, 96,103,110,116,125

I googled it and everywhere this question is asked but without answer.

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added:

this sequence comes from:

http://ocw.mit.edu/courses/electrical-engineering-and-computer-science/6-046j-introduction-to-algorithms-sma-5503-fall-2005/readings/l12_skiplists.pdf

first page

  • 17
    http://oeis.org/A0000542012-02-22
  • 0
    It's not in [OEIS](http://oeis.org/search?q=4%2C+14%2C+23%2C+34%2C+42%2C+50%2C+59%2C+66%2C+72%2C+79%2C+86%2C+96%2C103%2C110%2C116%2C125&language=english&go=Search) (which says a lot). Edit: Ah, add an 81 and you get Byron's comment.2012-02-22
  • 5
    Maybe 81 is no longer in service. We need a Manhattaner to comment.2012-02-22
  • 1
    seems to be a typo, 81 is ok http://en.wikipedia.org/wiki/81st_Street_%E2%80%93_Museum_of_Natural_History_(IND_Eighth_Avenue_Line)2012-02-22
  • 5
    There are uncountably many infinite sequences that start with those numbers.2012-02-22
  • 2
    Actually, 66 and 79 are missing in A000054.2012-02-22
  • 3
    In light of the answer, I really should vote to close as "off topic", but I just can't bring myself to do it...2012-02-23
  • 1
    The source PDF file has a really big clue: "Boxed values are “express” stops; others are normal stops."2012-02-23

1 Answers 1