The number of new patents added by a company increases geometrically every year.

2 4 8 16 =2*( 1+2+4+8)

3 .=3*( 1+2+4+8)

4 .=4*( 1+2+4+8)

1*( 1+2+4+8)+2*( 1+2+4+8)+3*( 1+2+4+8)+4*( 1+2+4+8)

( 1+2+3+4)*( 1+2+4+8)= 150