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Old 2018-02-01, 22:02   #16
science_man_88
 
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"Forget I exist"
Jul 2009
Dumbassville

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Quote:
Originally Posted by CRGreathouse View Post
True, but the bounds are pretty tight: n! + (n-1)! + (n-2)! + n-3 <= A180632(n) <= n! + (n-1)! + ... + 2! + 1!.
I see why it's so hard, just annoying. It's hard to brute force when options for endpoint pairs grow by a factor of n^2.
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