275520

Appears in sequences

• Structured great rhombicosidodecahedral numbers.at n=19A100145
• Number of 2 X 2 matrices with entries in {0,1,...,n} and odd determinant with no entry repeated.at n=30A279483
• Lesser of semi-unitary amicable numbers pair: numbers (m, n) such that susigma(m) = susigma(n) = m + n, where susigma(n) is the sum of the semi-unitary divisors of n (A322485).at n=23A322541
• Smallest BII-number of an intersecting antichain with n edges.at n=5A329628
• Least k such that there are exactly A003586(n) ways to choose a binary index of each binary index of k.at n=26A368111