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 A267118 Lee Sallows's 3 X 3 semimagic square of squares, read by rows. 2
 16129, 2116, 3364, 4, 12769, 8836, 5476, 6724, 9409 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Three rows, three columns and one diagonal sum to the same number: 21609 = 147^2. See the link to mersenneforum.org about triangular numbers that form such semimagic squares. LINKS Christian Boyer, Magic squares of squares mersenneforum.org, discussion titled A special semimagic square Carlos Rivera, Problem 63 Lee Sallows, The lost theorem, The Mathematical Intelligencer, 19:4 (1997), pp. 51-54. EXAMPLE The semimagic square is |-----|-----|-----| |16129| 2116| 3364| |-----|-----|-----| |  4  |12769| 8836| |-----|-----|-----| | 5476| 6724| 9409| |-----|-----|-----| It is: |-----|-----|-----| |127^2| 46^2| 58^2| |-----|-----|-----| | 2^2 |113^2| 94^2| |-----|-----|-----| | 74^2| 82^2| 97^2| |-----|-----|-----| CROSSREFS Cf. A000290, A221669. Sequence in context: A222419 A252603 A335305 * A145717 A184405 A134120 Adjacent sequences:  A267115 A267116 A267117 * A267119 A267120 A267121 KEYWORD nonn,fini,full,tabf AUTHOR Arkadiusz Wesolowski, Jan 11 2016 STATUS approved

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Last modified July 29 17:41 EDT 2021. Contains 346346 sequences. (Running on oeis4.)