6667920

Appears in sequences

• a(n) = Sum_{k=1..n-1} k^3*sigma(k)*sigma(n-k).at n=20A000499
• Number of labeled n-node 4-valent graphs containing a single double edge.at n=9A058830
• Triangle read by rows: T(n,h)/(n-1), where T is the array in A101819.at n=33A101820
• Numbers n such that n^k is the sum of a positive square and a positive cube for all k not divisible by 6.at n=10A274247