Sum of series with alternate signed squares of AP | Function to calculate series sum ; Driver code
def seiresSum ( n , a ) : NEW_LINE INDENT return ( n * ( a [ 0 ] * a [ 0 ] - a [ 2 * n - 1 ] * a [ 2 * n - 1 ] ) / ( 2 * n - 1 ) ) NEW_LINE DEDENT n = 2 NEW_LINE a = [ 1 , 2 , 3 , 4 ] NEW_LINE print ( int ( seiresSum ( n , a ) ) ) NEW_LINE