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 A170928 Least magic constant of magic squares using Smith numbers. 2
 822, 1195, 1636, 2472, 3720, 5856, 8737, 12202, 16335, 21333, 27612, 35185, 43968, 54013, 65464, 78281, 92422, 107932, 126404, 147816, 171556, 197041, 224506, 253587, 285314, 320620, 359151, 400064, 442886, 487920, 536844, 589129, 644797 (list; graph; refs; listen; history; text; internal format)
 OFFSET 3,1 COMMENTS a(n) >= (1/n)*Sum_{i=1..n^2} A006753(i). LINKS Natalia Makarova, Construction of smallest magic squares from Smith numbers (in Russian) EXAMPLE Magic square of order 3: see the book: M. Gardner. From the Penrose tilings to securely encrypted, 1993:    94 382 346   526 274  22   202 166 454 . The magic constant S = 822 Orders 4 to 6 are from participants of scientific forum dxdy.ru The square of order 4:    22 346 562 265   778 274  85  58     4 454 382 355   391 121 166 517 . S = 1195 The square of order 5:   355 576   4 319 382   454  85 391 648  58    27 535 346 526 202   706 166 378 121 265    94 274 517  22 729 . S = 1636 The square of order 6:   729   4 636 762  22 319    27 663 654 526  85 517   391 645  58 378 438 562   382 346 454 121 634 535   355 648  94 483 627 265   588 166 576 202 666 274 CROSSREFS Sequence in context: A002140 A095965 A059002 * A103764 A189121 A326817 Adjacent sequences:  A170925 A170926 A170927 * A170929 A170930 A170931 KEYWORD nonn,base AUTHOR Stefano Tognon, Feb 04 2010 EXTENSIONS a(7), a(9) added by Natalia Makarova, Apr 02 2010 Edited by Max Alekseyev, May 26 2012 STATUS approved

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Last modified November 28 05:30 EST 2021. Contains 349401 sequences. (Running on oeis4.)