192613domain: NPropertiesPrimalityPrimeyesAppears in sequencesPrime numbers p such that the set of composite numbers in the range [p+1, nextprime(p)-1] has more than one element and all the elements have the same number of divisors.at n=21A332740E.g.f. satisfies A(x) * log(A(x)) = (exp(x*A(x)) - 1)^2 / 2.at n=8A357088Prime numbersat n=17381