theseThese are some ways i'veI've used so far they. They are sorted by grow rate (just multiplied every equation by a constant value):
exp = level (this one may seem odd but for some games that reward exp changes according to player level like borderlands this one may fit to)
exp = level +* log10(level)
1 0 2 0.6 3 1.4 4 2.4 5 3.5 6 4.6exp = level^const_value : for my example I set const value to 3/2
1 1 2 2.8 3 5.1 4 8 5 11.2 6 14.7
// Above Series will be achieved by exp = level * log10(level)
exp = level^const_value : for my example i set const value to 3/2
1 1 2 2.8 3 5.1 4 8 5 11.2 6 27