2573344

Appears in sequences

• Constant term of the reduction of the n-th 2nd-kind Chebyshev polynomial by x^2 -> x+1.at n=14A192235
• Numbers n such that sigma(n) = sigma(n - phi(n)), where sigma(n) is the sum of divisors of n and phi(n) is the Euler totient function of n.at n=30A228519
• Lesser of a pair of amicable numbers k < m such that s(k) = m and s(m) = k, where s(k) = A162296(k) - k is the sum of aliquot divisors of k that have a square factor.at n=31A357495