12252240

Appears in sequences

• a(n) = denominator of harmonic number H(n) = Sum_{i=1..n} 1/i.at n=16A002805
• a(n) = LCM(1,2,...,n) / n.at n=18A002944
• Least common multiple (or LCM) of {1, 2, ..., n} for n >= 1, a(0) = 1.at n=17A003418
• Least common multiple (or LCM) of {1, 2, ..., n} for n >= 1, a(0) = 1.at n=18A003418
• Numbers k such that sigma(k)/phi(k) sets a new record.at n=35A018894
• a(n) = LCM{1, C(n-1,1), C(n-2,2), ..., C(n-[ n/2 ],[ n/2 ])}.at n=18A025560
• Least common multiple of integers less than and prime to n.at n=18A038610
• a(n) = lcm{ 1,2,...,x } where x is the n-th prime power (A000961).at n=11A051451
• a(0)=1; thereafter a(n) = lcm(1, 2, 3, 4, ..., prime(n)).at n=7A056604
• a(n) is the largest integer m such that m is divisible by every integer in the interval 1 <= x <= m^(1/n).at n=5A060942
• a(n) is the least common multiple of numbers in {1,2,3,...,n-1} which do not divide n.at n=18A067391
• Denominator(sum(i=1,n,1/i^4))/denominator(sum(i=1,n,1/i^3)).at n=16A069047
• a(n) = lcm(1..n) / ((n+1)(n+2)...(n+k)) where k is the largest number which gives an integral value.at n=17A069491
• Least number m such that integer part of sigma(m)/phi(m) equals n.at n=25A070033
• Denominators of a(n+1) = Sum_{k=1..n} a'(n/k), a(1)=1, where a'(x)=a(x) if x integer and is linearly interpolated otherwise.at n=37A071796
• Consider Pascal's triangle A007318; a(n) = LCM of terms at +45 degree slope with the horizontal.at n=19A073618
• Denominators of Sum_{k=1..n} 1/lcm(n,k).at n=16A074949
• Denominators of Sum_{k=1..n} 1/lcm(n,k).at n=17A074949
• Least common multiple of n numbers starting with n.at n=8A076100
• Distinct values of A080374, where A080374(n) is the lcm of the first n consecutive prime differences.at n=11A080375