elem.7.def.9
An even-times odd number is that which is measured by an even number according to an odd number.
Ἀρτιάκις δὲ περισσός ἐστιν ὁ ὑπὸ ἀρτίου ἀριθμοῦ μετρούμενος κατὰ περισσὸν ἀριθμόν. &`10 1$