its just n(n+1) over and over again f(1)=1(1+1)=1*2=2 f(2)=2(2+1)=2*3=6 f(3)=6(6+1)=6*7=42 f(4)=42(42+1)=42*43=1806 f(5)=1806*1807=3263442 f(6)=1.0650056951e13 f(7)=1.1342371306e26 f(8)=1.2864938684e52 f(9)=1.6550664734e104 f(10)=2.7392450314e208 also some numbers might be wrong holy sheet of paper i cooked so much that i got 1+ likes WOHHO