3 6 2 7 1 8 July 8, 2019 16 32 64 128 3 6 x 1 2 7 8 6 5 3 8 x 2 7 x 1 6 1 6 2 7 3 8 to 100 terms 1 2 3 6 7 8-hxcdd 1 2 3 6 7 8 hxcdf 6 2 3 divided by 1 7 8 1 2 3 6 7 8 hexahydropyrene 1 2 3 6 7 8 hxcdd cas ( 3 7 2 6 k 8 1 5 ) 1 2 3 6 7 8 hexachlorodibenzofuran
