what is the sum of the interior angles of an icosagon
Icosagon In geometry, an icosagon or 20-gon is a twenty-sided polygon. The sum of any icosagon's interior angles is 3240 degrees.
1 + 2 + 3 + 4 + ⋯ which increases without bound as n goes to infinity. Because the sequence of partial sums fails to converge to a finite limit, the series does not have a sum.
Limit of a function (the Dirichlet function) has no limit at any x-coordinate.
Alonso Álvarez de Pineda