Find the sum of each row in pascals triangle. is there a pattern

The first 1 in 1 contains two 1's, both formed by adding the two numbers above them to the left and the right in this case 1 and 0 (all numbers outside the triangle are 0's). Do the same to create the second row : 0+1 = 1; 1+0=1; 1+1=2; 1+0=1; And the third row you put:0+1 = 1; 1+2=3; 2+1 = 3; 1+0=1