25180

Appears in sequences

• Number of nonisomorphic configurations of degree >= 2 (or generators) of n triples in Steiner triple systems.at n=9A082790
• Principal diagonal of the convolution array A213548.at n=14A213549
• Irregular table read by rows: T(n,k) is the start of the first run of exactly k consecutive even integers having exactly n divisors, or 0 if no such run exists.at n=19A325117
• Numbers k such that s(k) = s(k+1), where s(k) is the unitary analog of the alternating sum-of-divisors function (A307037).at n=14A333408
• Number of integer partitions of the n-th squarefree semiprime into squarefree semiprimes.at n=53A338903
• Number of integer partitions of n with more than one part of least multiplicity.at n=39A362609