OK, but you can you *derive* that formula?
Does “look up in OEIS” count as “derive”?
Tim: You, William, David, and others have figured me out. I suppose there are worse habits than repeatedly clicking the "Webcam" button on OEIS.
Is it an Armstrong number?
Numbers spiral diagonals (Part 2)
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Numbers on 7-segment
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Solve a ballot counting problem
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Set the Euler-Mascheroni constant with an identity using available MATLAB functions
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