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.
Extract leading non-zero digit
Numbers with prime factors 2, 3 and 5.
Sophie Germain prime
Unique values without using UNIQUE function
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List the cuban primes
Count the square-full divisors of a number
Compute Khinchin's constant
Determine the Zeckendorf expansion of a number
Pick the die most likely to win
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