103515091680
domain: N
Appears in sequences
- Increasing sequence obtained by union of two sequences {b(n)} and {c(n)}, where b(n) is the smallest odd composite number m such that both m-2 and m+2 are prime and the set of distinct prime factors of m consists of the first n odd primes and c(n) is the smallest composite number m such that both m-1 and m+1 are primes and the set of the distinct prime factors of m consists of the first n primes.at n=19A136358
- The smallest number beginning with n whose distinct prime factors are the first n primes.at n=9A225903
- Semi-unitary highly composite numbers: where the number of semi-unitary divisors of n (A322483) increases to a record.at n=30A322484
- Numbers k with record values of the ratio A000005(k)/A049419(k) between the number of divisors of k and the number of exponential divisors of k.at n=15A361807
- Numbers k that have a record number of divisors d such that gcd(d, k/d) is a square.at n=22A377707
- a(n) = P(n) * 2^floor(log_2(prime(n+1))) = A002110(n) * A000079(A098388(n+1)).at n=10A378144
- a(n) is the least multiple of the n-th primorial such that both a(n)-1 and a(n)+1 are prime and the prime factors of a(n) do not exceed prime(n).at n=9A382785