1819392

Appears in sequences

• Expansion of e.g.f. exp(2*(exp(2*x) - 1)).at n=7A308543
• Triangle read by rows. T(n, k) = k^n * BellPolynomial(n, k).at n=30A350257
• Integers k such that there exists an integer 0<m<k such that sigma(k) = sigma(m) = m + 2*k.at n=30A383239