15th row (1-13) total 13 entries. Cyclic Redundancy Check and Modulo-2 Division, Josephus problem | Set 1 (A O(n) Solution), Write a program to print all permutations of a given string, Set in C++ Standard Template Library (STL), Program to find GCD or HCF of two numbers, Write Interview But this approach will have O(n3) time complexity. 2n = ( 20 + 21 + 22 + 23 +. How to swap two numbers without using a temporary variable? The row-sum of the pascal triangle is 1<