public IEnumerator <int> GetEnumerator()
{
int x = 1;
while (true)
{
x++;
yield return(PentagonalFormulas.PentagonalFormula(x));
}
}
public IEnumerator <Tuple <int, int> > GetEnumerator()
{
int topNumber = 1;
int subNumber = 1;
while (true)
{
if (subNumber == 1)
{
topNumber++;
subNumber = topNumber - 1;
}
else
{
subNumber--;
}
int pentagonalFirst = PentagonalFormulas.PentagonalFormula(topNumber);
int pentagonalSecond = PentagonalFormulas.PentagonalFormula(subNumber);
yield return(new Tuple <int, int>(pentagonalFirst, pentagonalSecond));
}
}
