73840

Appears in sequences

• Molecular topological index of the n-antiprism graph.at n=25A192791
• Column 3 of array in A226513.at n=39A226514
• T(n,k)=Number of length n+4 0..k arrays with no disjoint pairs in any consecutive five terms having the same sum.at n=45A247404
• Number of length 1+4 0..n arrays with no disjoint pairs in any consecutive five terms having the same sum.at n=9A247405
• a(n) = n*(n + 1)*(7*n + 11)/6.at n=39A255687
• Number x = concat(MSD(x),b) such that MSD(x)*b = phi(x), where MSD(x) is the Most Significant Digit of x and phi(x) is the Euler totient function of x.at n=33A286130