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 A232393 Michael Stifel's 4 X 4 multiplication magic square read by rows. 0
 32768, 4, 2, 4096, 256, 32, 64, 2048, 16, 512, 1024, 128, 8, 16384, 8192, 1 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS The square formed of natural numbers such that the products of the numbers of each row, each column and each diagonal are the same. REFERENCES Jacques Sesiano, Les carrés magiques dans les pays islamiques, Lausanne: Presses polytechniques et universitaire romandes, 2004, p. 182. Michael Stifel and Philipp Melanchton, Arithmetica integra, Nuremberg: Johannes Petreius, 1544, (29). LINKS Table of n, a(n) for n=1..16. Eric Weisstein's World of Mathematics, Multiplication Magic Square Wikipedia, Michael Stifel Index entries for sequences related to magic squares EXAMPLE The multiplication magic square is: |-----|-----|-----|-----| |32768| 4 | 2 | 4096| | | | | | |-----|-----|-----|-----| | 256 | 32 | 64 | 2048| | | | | | |-----|-----|-----|-----| | 16 | 512 | 1024| 128 | | | | | | |-----|-----|-----|-----| | 8 |16384| 8192| 1 | | | | | | |-----|-----|-----|-----| From Philippe Deléham, Nov 25 2013: (Start) It is : 2^15, 2^2, 2^1, 2^12 2^8, 2^5, 2^6, 2^11 2^4, 2^9, 2^10, 2^7 2^3, 2^14, 2^13, 2^0, and the square: |----|----|----|----| | 15 | 2 | 1 | 12 | | | | | | |----|----|----|----| | 8 | 5 | 6 | 11 | | | | | | |----|----|----|----| | 4 | 9 | 10 | 7 | | | | | | |----|----|----|----| | 3 | 14 | 13 | 0 | | | | | | |----|----|----|----| is a magic square with constant = 30. (End) CROSSREFS Sequence in context: A069416 A289478 A222528 * A217589 A069276 A195235 Adjacent sequences: A232390 A232391 A232392 * A232394 A232395 A232396 KEYWORD nonn,fini,full,tabf AUTHOR Arkadiusz Wesolowski, Nov 23 2013 STATUS approved

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Last modified September 26 19:26 EDT 2023. Contains 365666 sequences. (Running on oeis4.)