31875

Appears in sequences

• Number of ways to break {1,2,3,...,n} into sets with equal sums.at n=18A035470
• a(n)=Sum{T(n,j): j=1,2,...,n}, array T given by A048201.at n=34A048209
• Numbers k such that S(k)=d(k), where S(k) is the Kempner function (A002034) and d(k) is the number of divisors of k (A000005).at n=22A073307
• Numbers n such that number of divisors of n divides S(n), the Kempner function A002034.at n=33A073413
• Diagonal sums of triangle A099575.at n=23A099577
• a(n) = n^2*(2*n+1).at n=25A099721
• Number of permutations of length n which avoid the patterns 1234, 2143, 3421.at n=31A116842
• Integer areas of the first Neuberg triangles of integer-sided triangles.at n=8A230758
• Odd numbers m such that there exists no k for which the denominator of d(k)/k = m where d(k) is the number of divisors of k (A000005).at n=26A353320