sum ((i*(i+1)/2)/(10^i)) from i = 1 to infinity - Wolfram|Alpha

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Supported formats and sample files
Assuming "1" is referring to math | Use as a decimal number instead

Infinite sum:

link to /input/?i=100%2F729&lk=1&a=ClashPrefs_*Math-
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Decimal approximation:

link to /input/?i=0.1371742112482853223593964334705075445816186556927297&lk=1&a=ClashPrefs_*Math-
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Convergence tests:

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Partial sums:

Frame
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Download full output as:

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