When Numbers Interest PDF

[JSH]

More recently have been looking more to what I call number authority, with demonstrations of number theory with actual numbers where is primarily sums of squares because that's easy for me with some of my research. Like:

34967² + 752² + 1128² + 1880² + 2632² + 4136² + 4888² = 35721²

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Maybe was TOO easy for me. 

Is the start of the attached PDF where source is blog post:

http://somemath.blogspot.com/2017/10/when-numbers-interest.html