72800

Appears in sequences

• Numbers k not divisible by 6 such that sigma(k) > 3*k.at n=2A126104
• Triangle of coefficients of a polynomial sequence related to the Morgan-Voyce polynomials A085478.at n=61A211957
• Numbers n such that Sum_{i = 1..q} 1/d(i) is an integer where d(i) are the divisors of n for some q and n is primitive (the set {d(1), d(2), ..., d(q)} appears only once).at n=20A226853
• Noncube integers n such that n^2 + 1 is the sum of 2 positive cubes.at n=24A267119
• Triangle read by rows. A generalization of unsigned Lah numbers, called L[3,2].at n=16A290598
• Table read by rows, in which the n-th row lists all the primitive solutions k, in increasing order, such that k*sigma(k) = A337875(n).at n=36A337876
• Numbers that are the sum of four third powers in exactly nine ways.at n=27A345154
• Irregular triangle read by rows: T(n,k) is the number of n-permutations whose third-longest cycle has length exactly k; n >= 0, 0 <= k <= floor(n/3).at n=25A350015
• Number of sequences of integer partitions with total sum n that are rectangular, meaning all lengths are equal.at n=17A358905