247342095

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=14A136358
• Numbers with exactly 7 distinct odd prime divisors {3,5,7,11,13,17,19}.at n=18A147580