



def 		a__      (		_UpperCamelCase      :			int = 10_00				):
   return sum(2 * a * ((a - 1) // 2) for a in range(3			,n + 1				)				)


if __name__ == "__main__":
  print(solution())











from __future__ import annotations





def 		a__      (		_UpperCamelCase      :			int | float | str			,_UpperCamelCase      :			int | float | str				):
   if nth_term == "":
      return [""]
   __lowerCamelCase    				=     int(_UpperCamelCase				)
   __lowerCamelCase    				=     int(_UpperCamelCase				)
   __lowerCamelCase    				=     []
   for temp in range(int(_UpperCamelCase				)				):
      series.append(F"""1 / {pow(temp + 1			,int(_UpperCamelCase				)				)}""" if series else '''1'''				)
   return series


if __name__ == "__main__":
  import doctest

  doctest.testmod()

  a_								=       int(input("""Enter the last number (nth term) of the P-Series"""))
  a_								=       int(input("""Enter the power for  P-Series"""))
  print("""Formula of P-Series => 1+1/2^p+1/3^p ..... 1/n^p""")
  print(p_series(nth_term, power))






