cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

A033812 The Loh-Shu 3 X 3 magic square, lexicographically largest variant when read by columns.

Original entry on oeis.org

8, 1, 6, 3, 5, 7, 4, 9, 2
Offset: 1

Views

Author

Olivier Gorin (gorin(AT)roazhon.inra.fr)

Keywords

Comments

Of course there are a large number of ways to convert this (unique) magic square to a sequence by reading it by rows, so the sequence is hardly unique. - N. J. A. Sloane, Aug 29 2002
This magic square is referred to Loh-Shu magic square and is attributed to the legendary Fu Xi (Fuh-Hi).
Among all the equivalent variants of this magic square (modulo rotations and reflections) this one can be characterized as the lexicographically largest one when read by columns, i.e., (8, 3, 4, 1, ...), while the lexicographically smallest one would be (2, 7, 6, 9, ...). - M. F. Hasler, Jan 26 2019

Examples

			The magic square is
[ 8 1 6 ]
[ 3 5 7 ]
[ 4 9 2 ]
		

Crossrefs

Cf. A126709.
Sequences A126652 and adjacent list several multiples and other affine transforms of this one.

Extensions

Edited by M. F. Hasler, Jan 26 2019