Question 783818
Since the second and 5th terms aren't given, guess the second term.  Complete the sequence, then see if you need to guess lower or higher.<P>
Guess 10:  4, 10, 14, 24, 38, 62...  It needs a higher 2nd term, but not much higher. <P>
Guess 12:  4, 12, 16, 28, 44, 72... It needs a lower 2nd term.  The only lower integer is 11.  Try it.  Hopefully it isn't some number plus fraction like 11.5.<P>
4, 11, 15, 26, 41, 67...  11 works.