67 School Guide; // Java code to demonstrate right star triangle. Now lets proceed to express the entries in Pascals triangle using the nCr formula. 36%. Pascal's Triangle; Butterfly Pattern; 54321 5432 543 54 5 Pattern; 1 12 123 Pattern; 1 22 333 Pattern; 1-10-101-1010 pattern; a ab abc abcd Pattern; Python One Line Code To Find Factorial (3 Methods) Dictionary Examples. Does Python convert files to .exe on its own? The classical Sieve of Eratosthenes algorithm takes O(N log (log N)) time to find all prime numbers less than N. In this article, a modified Sieve is discussed that works in O(N) time. In the second program the condition of first loop should be x