1531530

Appears in sequences

• Integers n for which the ratio phi(n)/pi(n) is smaller than for any subsequent n. Here phi(n) is Euler's totient function and pi(n) is the number of primes that are at most n.at n=34A080289
• Largest element of n-th row of A080738.at n=27A080742
• a(n) is the lcm of related numbers to n (counted in A073757): related = {divisor-set, RRS}.at n=17A083268
• Least common multiple of all cycle sizes in range [A014137(n-1)..A014138(n-1)] of permutation A089865/A089866.at n=10A089845
• First occurrence (*2) of n in A088627 - or - least number that yields n different primes if you factorize it in all possible ways in two factors and add these factors.at n=38A091350
• a(n) is least number k such that k/P > P^n, with n and P (=P(k)) as in A051283.at n=3A110612
• Table read by antidiagonals: row n contains the positive integers (in order) which are coprime to the n-th prime and do not occur in earlier rows.at n=47A125703
• Sums of the products of n consecutive triples of numbers.at n=21A135037
• Denominator of the polynomial A_l(x) = Sum_{d=1..l-1} x^(l-d)/d for index l=2n+1 evaluated at x=2.at n=8A145612
• Numbers with exactly 7 distinct prime divisors {2,3,5,7,11,13,17}.at n=2A147574
• Denominators of row sums of the triangle (lower triangular matrix) log(F) with F:=A037027 (Fibonacci convolution matrix).at n=19A181350
• Numbers with prime factorization pqrstuv^2.at n=4A190381
• Upward antidiagonals of array of all multiples of primorial(n), for each n>0.at n=38A253588
• Even terms in A260442 (in A260443).at n=23A277200
• Least positive integer k with exactly n odd divisors greater than sqrt(2*k).at n=38A281008
• Numbers m that set records for the ratio A045763(n)/n.at n=42A294492
• a(n) = (9*n)!*(4*n)!/((8*n)!*(3*n)!*(2*n)!).at n=4A295439
• a(n) is the least positive integer k such that it has exactly n triples of divisors (d1, d2, d3) such that they are pairwise coprime and d1 < d2 < d3 < 2*d1.at n=8A336629
• a(n) is the least k > 0 such that 1+k, 1+2*k, ..., 1+n*k are pairwise coprime.at n=30A339743
• Distinct values in A339743, in order of appearance.at n=12A339759