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Re:The On-Line Encyclopedia of Integer Sequences by pathikrit on Monday July 20, 2015 @08:17PM (#9919952)
Some real ones from TopCoder in my experience (SRM 401, Div 1): http://apps.topcoder.com/forums/?module=Thread&threadID=6126...

(SRM 363, HandShake problem): http://apps.topcoder.com/forums/?module=Thread&threadID=5843...

The idea is you brute force or hand calculate the first few numbers and then use the OEIS's wild card search.

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