static void Main(string[] args)
{
var pentagonNums = PentagonalNumberGenerator.Generate().TakeWhile(n => n < 10000000).ToList();
var answer = (from p1 in pentagonNums
from p2 in pentagonNums
where p1 > p2
where pentagonNums.Contains(p1 + p2)
where pentagonNums.Contains(p1 - p2)
select p1 - p2)
.Min();
Console.WriteLine(answer);
Console.WriteLine("Done");
Console.ReadKey();
}
public void Setup()
{
generator = new PentagonalNumberGenerator();
pairsGenerator = new PentagonalPairsGenerator();
}
