440000

Appears in sequences

• a(n) = n^2 with each digit repeated.at n=19A248126
• For any number n > 0, let f(n) be the polynomial of a single indeterminate x where the coefficient of x^e is the prime(1+e)-adic valuation of n (where prime(k) denotes the k-th prime); f establishes a bijection between the positive numbers and the polynomials of a single indeterminate x with nonnegative integer coefficients; let g be the inverse of f; a(n) = g(f(n) o f(n)) (where o denotes function composition).at n=19A326377
• a(n) is the least number with exactly n divisors of the form 3*k+1.at n=34A364582
• a(n) is the least number with exactly n divisors of the form 3*k+2.at n=35A364583