4754880

Appears in sequences

• Number of fusenes with 25 hexagons, C_(2v) symmetry and containing n carbon atoms.at n=23A123598
• Harmonic numbers m from A001599 such that m*(m-tau(m))/sigma(m) is not an integer, where k-tau(k) = the number of nondivisors of k (A049820), tau(k) = the number of divisors of k (A000005) and sigma(k) = the sum of the divisors of k (A000203).at n=30A325022
• Numbers k with at least two divisors d for which sigma(k) = d*sigma(d).at n=4A344102
• Expansion of e.g.f. 1/(1 - x/8 * (exp(4 * x) - 1)).at n=9A354326