27385

Appears in sequences

• Numbers k such that lcm(1,2,3,...,k)/13 equals the denominator of the k-th harmonic number H(k).at n=11A112818
• a(n) = n*A171106(n).at n=4A171107
• Numbers k that divide A239876(k).at n=10A239877
• Triangle read by rows: T(n,k) = K(n,1)*I(k,1) - (-1)^(n+k)*I(n,1)* K(k,1), where I(n,x) and K(n,x) are Bessel functions; 0<=k<=n.at n=49A246658
• Number T(n,k) of set partitions of [n] having exactly k pairs (m,m+1) such that m+1 is in some block b and m is in block b+1; triangle T(n,k), n>=0, 0<=k<=n-floor((1+sqrt(max(0,8n-7)))/2), read by rows.at n=31A270953
• Number of set partitions of [n] having exactly two pairs (m,m+1) such that m+1 is in some block b and m is in block b+1.at n=5A270956
• a(n) = (prime(1+n)*prime(n)) + prime(n) + 1.at n=37A286624
• Sum of the third largest parts of the partitions of n into 10 parts.at n=42A326596