Solved

Iterate the sum of divisors and totient

5 years ago

Solved

Add 100

5 years ago

Solved

Solve an ODE: diffusion problem 2

5 years ago

Solved

Construct a continued fraction for a square root

5 years ago

Solved

Convert a number from base 10 to factorial notation

5 years ago

Solved

Convert a number from factorial notation to base 10

5 years ago

Solved

Count numbers whose reciprocals' decimal expansions terminate

5 years ago

Solved

List prime anagrams of a number

5 years ago

Solved

Find integer solutions to an equation with a sum of binomial coefficients

5 years ago

Solved

Compute an improper integral of a ratio of algebraic functions

5 years ago

Solved

Solve an ODE: second-order linear equation with constant coefficients

5 years ago

Solved

Characterize the final state of another digit inventory sequence

5 years ago

Solved

Compute a row of the Kimberling shuffle

5 years ago

Solved

Solve an ODE: diffusion problem 1

5 years ago

Solved

Count the square-full divisors of a number

5 years ago

Solved

Compute home primes in a given base

5 years ago

Solved

Solve a nonlinear difference equation

5 years ago

Solved

Locate a family on a long street

5 years ago

Solved

Find pairs of primes with the same digit sum and a specified separation

5 years ago

Solved

Compute an integral of a product of sinusoids

5 years ago

Solved

Solve an ODE: equation for a 2D laminar jet

5 years ago

Solved

List composite numbers that cannot be written as the sum of two primes

5 years ago

Solved

Deduce the pattern behind the sequence

5 years ago

Solved

Round up to π

5 years ago

Solved

Identify prime words

5 years ago

Solved

Find pairs of primes with the same digit sum

5 years ago

Solved

Solve an ODE: separable equation

5 years ago

Solved

Compute the nth term from the golden sieve

5 years ago

Solved

Compute the nth term from the Sieve of Flavius Josephus

5 years ago

Solved

Solve an ODE: equidimensional equation

5 years ago

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