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RobPratt
  • Member for 6 years, 10 months
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  • NC, USA
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  • Senior R&D Manager, SAS Institute Inc.
  • Ph.D. in Operations Research, The University of North Carolina at Chapel Hill

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56
What is the optimal number of dice to roll a Yahtzee in one roll?
Feb 6, 2020
43
What is the closed form of the $f$ with $f(1)=1$, $f(2)=7$ and $f(n)=7f(n-1)-12f(n-2)$ ($n\ge 3$)?
Jul 14, 2019
30
The puzzle of chess pieces beating one another in “rock—paper—scissors” way
Jul 27, 2025
25
Can we arrange $\{1,...,16\}$ in $4\times 4$-grid so {products of rows} = {products of columns}?
Jan 22, 2020
24
Is there a generating function for any finite sequence of random numbers?
Apr 7, 2020
18
Optimal strategy for 1-player "snowball" game
Dec 30, 2024
18
How can I prove both series are equal?
Aug 18, 2024
15
Number of ways to label die with opposing faces summing to 7
Jan 1, 2020
14
How to geometrically determine number of holes for a triangle
Dec 17, 2022
14
Does it exist a way how to find the ways to get from one point to another when certain points must be avoided in a grid?
Mar 21, 2020

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40
Fitting the 9th piece into the pizza box
32
Which heptomino is it obvious can't tile the plane?
31
Checkmate 30 kings with rooks
30
How to linearize the product of two binary variables?
25
What node does 11 point to?