On the Sum of Corresponding Factorials and Triangular Numbers
... polite number is defined as a positive integer that can be written as the sum of two or more consecutive positive integers and if all numbers in the sum are strictly greater than 1, the polite number is also called trapezoidal number because it represents pattern of points arranged in a trapezoid [4 ...
... polite number is defined as a positive integer that can be written as the sum of two or more consecutive positive integers and if all numbers in the sum are strictly greater than 1, the polite number is also called trapezoidal number because it represents pattern of points arranged in a trapezoid [4 ...
