Semiperfect magic cube
From HandWiki
In mathematics, a semiperfect magic cube is a magic cube that is not a perfect magic cube, i.e., a magic cube for which the cross section diagonals do not necessarily sum up to the cube's magic constant.
References
- Pickover, Clifford A. (2003), The Zen of Magic Squares, Circles, and Stars: An Exhibition of Surprising Structures across Dimensions, Princeton University Press, p. 98, ISBN 1400841518, https://books.google.com/books?id=-mu8O8RMG6QC&pg=PA98.
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