Well, the 1, 2.2, 4.7 E3 sequence that is embedded in the E12 sequence is plenty close enough for almost all applications. The successive ratios are noticeably

Well, the 1, 2.2, 4.7 E3 sequence that is embedded in the E12 sequence is plenty close enough for almost all applications. The successive ratios are noticeably more consistent than for the 1,2,5,10 sequence (2.2, 2.14, 2.13 versus 2, 2.5, 2)