118483

Appears in sequences

• Heptagonal numbers (A000566) that are semiprimes (A001358).at n=31A259676
• a(n) = Sum_{k=0..n} k! * k^(k*n) * Stirling2(n,k).at n=3A351117
• a(n) is the numerator of Sum_{k=0..n} (-1)^k / (k!)^2.at n=7A354304