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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

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16  
oeis.org/A000054 –  Byron Schmuland Feb 22 '12 at 13:47
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Maybe 81 is no longer in service. We need a Manhattaner to comment. –  Grumpy Parsnip Feb 22 '12 at 13:55
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There are uncountably many infinite sequences that start with those numbers. –  user5137 Feb 22 '12 at 18:36
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Actually, 66 and 79 are missing in A000054. –  Dejan Govc Feb 22 '12 at 20:58
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... –  Nate Eldredge Feb 23 '12 at 19:15
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1 Answer

Except for the 4 at the beginning, the other numbers are the stops on the Number 1 subway line in New York City. If one started at the Courant Institute and wanted to go to Columbia University, and walked (it would take about 20 minutes) over to the Christopher St. stop - about 7th St., these are the stops that the train would make. (Courant is at 3rd St. and Mercer.)

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Except that 28 St is missing. Perhaps one should take the A train from W 4 St and change to the 1 at 59 St / Columbus Circle. I think the stops on that route match the given sequence exactly. For reference: mta.info/nyct/maps/submap.htm –  Nate Eldredge Feb 23 '12 at 19:13
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