75389157377
domain: N
Appears in sequences
- a(n) = smallest number k such that k-1 and k+1 both have exactly n prime divisors (counted with multiplicity).at n=17A154704
- a(n) is the first semiprime k such that k-1 and k+1 each have exactly n prime factors (counted with multiplicity).at n=17A365537
- Smallest number m such that both m-1 and m+1 are products of at least n (not necessarily distinct) primes.at n=17A384876