Abstract
I VENTURE to send you what I believe to be a very rare magic square of fifth order. Although there are more than 260,000 bordered squares of fifth order with the number 13 in the centre of the square, it seems a very rare thing indeed for any other number than 13 to be in the centre. I have not found any with the usual proportion (39/26) between the Row of the Heart and the rest of the Row, and it was not until the proportion 36/29 arrived that I found it was possible to make one. I append the square. Subtracting each number from 26 will give the proportion 42/23. I believe there are only two (not including inversions) with 17 in the centre of the square.
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BURNETT, J. Magic Square of Fifth Order. Nature 125, 17 (1930). https://doi.org/10.1038/125017b0
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DOI: https://doi.org/10.1038/125017b0
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