220540320

Appears in sequences

• a(n) = (n/(n+1)) * lcm(1,2,...,n+1).at n=17A025558
• a(n) = n*lcm{1,2,...,n}.at n=17A081528
• First differences of A003418(n) = lcm(1..n).at n=18A119944
• Earliest sequence such that xy | a(x+y) for all x>=1, y>=1.at n=17A169900
• Least number k such that sigma(k) >= 2^n.at n=29A172516
• Numbers k such that sigma(k) > 5*k.at n=4A215264
• Primitive 5-abundant numbers: Numbers k such that sigma(k) > 5k (A215264) all of whose proper divisors d are 5-deficient numbers (having sigma(d) < 5d).at n=4A307115
• Nonexponential superabundant numbers: numbers m such that nesigma(m)/m > nesigma(k)/k for all k < m, where nesigma(m) is the sum of nonexponential divisors of m (A160135).at n=21A348630
• Square array read by antidiagonals: row n lists numbers whose maximal frequency in a fixed row of A036038 (or A078760) is equal to n, i.e., numbers m such that A376663(m) = n.at n=31A376667
• Positive integers whose maximum frequency in a fixed row of A036038 (or A078760) is equal to 4, i.e., numbers m such that A376663(m) = 4.at n=4A376671