Geometrik sequens...term(n+1)=konst*term(n)
term10=3/512
term15=3/16384
term15/term10=(3/16384) / (3/512)
=512/16384=1/32 =(1/2)^5
so term(n+1)=(1/2)*term(n)
term30=(term15) / (2^15)
=(term15) / 32,768
=(3/16385) / 32768
=3/(536,903,680)
or 3 / 2^29
=3*2^-29