Maybe too late, and a little unorthodox, however the answer is 316 😁
21 + 10 > 1²+((2+1)*10)=31
22 + 20 > 2²+((2+2)*20)=84
23 + 30 > 3²+((2+3)*30)=159
24 + 50 > 4²+((2+4)*50)=316
Maybe too late, and a little unorthodox, however the answer is 316 😁
21 + 10 > 1²+((2+1)*10)=31
22 + 20 > 2²+((2+2)*20)=84
23 + 30 > 3²+((2+3)*30)=159
24 + 50 > 4²+((2+4)*50)=316