814968

Appears in sequences

• a(n) = (1 + 1/2 + 1/3 + ... + 1/n)*(2n-1)!/(n-1)!.at n=5A058607
• Worpitzky(n, k)*Harmonic(k), triangle read by rows.at n=42A176276
• Numbers with at least three 3s in their prime signature.at n=13A176359
• Read terms e = T(n,k) in A333624 as Product(prime(k)^e) for n in A334769.at n=14A334896
• Read terms e = T(n,k) in A333624 as Product(prime(k)^e) for n in A334769.at n=21A334896
• Triangle read by rows. T(n, k) = |Stirling1(n, k)| * Stirling2(n + k, n) = A132393(n, k) * A048993(n + k, n).at n=30A354797
• a(n) = Sum_{k=0..n} C(n)^2 * binomial(n + k, k), where C(n) is the n-th Catalan number.at n=5A358368
• Numbers that have exactly three exponents in their prime factorization that are equal to 3.at n=13A386802