194090796900
domain: N
Appears in sequences
- Least common multiple of {b(1),...,b(n)}, where b(k) = k(k+1)(2k+1)/6 = A000330(k).at n=13A051538
- First differences of sequence of primorials.at n=10A061720
- a(1)=1; for n > 0, a(n+1) = rad(a(n))*n where rad=A007947.at n=30A066332
- Cubefree superabundant numbers: cubefree numbers (A004709) k such that sigma(k)/k > sigma(j)/j for all cubefree numbers j < k.at n=26A308618
- Cubefree colossally superabundant numbers: cubefree numbers (A004709) k for which there is a positive exponent epsilon such that sigma(k)/k^{1 + epsilon} >= sigma(j)/j^{1 + epsilon} for all cubefree j > 1, so that k attains the maximum value of sigma(k)/k^{1 + epsilon} over the cubefree numbers.at n=12A309875
- Numbers for which the number of their semiprime divisors sets a new record.at n=26A350424
- a(n) = denominator(Sum_{j=0..n} Bernoulli(j, 1) * Bernoulli(n - j, 1)).at n=28A363151
- a(n) = denominator(Sum_{j=0..2*n} Bernoulli(j, 1) * Bernoulli(2*n - j, 1)).at n=14A363152
- Numbers that have more cubefree divisors than any smaller number.at n=34A377139