28375

Appears in sequences

• Numbers k such that k through k+4 all have the same number of divisors.at n=6A049051
• First of three consecutive numbers with at least one 3 in their prime signature.at n=2A176350
• The smallest integer that begins the longest run of consecutive integers with the prime signature of A025487(n).at n=7A178811
• Numbers k such that k and k+1 are both of the form p*q^3 where p and q are distinct primes.at n=24A215173
• Consider a k-digit number m = d_(k)*10^(k-1) + d_(k-1)*10^(k-2) + ... + d_(2)*10 + d_(1). Sequence lists the numbers m that divide Sum_{i=1..k-1}{d_(i)^d_(i+1)}+d_(k)^d_(1).at n=16A243024
• Starts of runs of 3 consecutive numbers that have an equal number of unitary and nonunitary divisors (A048109).at n=1A335397
• Starts of runs of 3 consecutive numbers that have an equal number of unitary and nonunitary prime divisors (A348097).at n=25A348099
• Starts of runs of 3 consecutive integers that are divisible by the cube of their least prime factor.at n=3A365868
• Triangle read by rows: the n-th row gives the least sequence of n consecutive numbers with the same number of divisors.at n=16A376557
• G.f. A(x) = exp( Sum_{n>=1} (n^2 - A384819(n))*x^n/n ) where A384819(k) < k for k >= 1 such that A(x) is a power series with integral coefficients.at n=21A384820
• Numbers m such that Stern polynomial B(m,x) has no irreducible polynomial factors that themselves are Stern polynomials. The initial a(1) = 1 is included by convention.at n=37A389918