Question

3,15,78,471,and then what ?

Answer 1

Answer:

3*4+3= 15

15*5+3=78

78*6+3=471

471*7+3=3300

Answer 2

Answer:

5,150,385 maybe 3*5 ,15*5+3(3 raise to power 1) ,78*5+81(3 raise to power 4) therefore 471*5+2355(3 raise to power 7