115327domain: NPropertiesPrimalityPrimeyesAppears in sequencesNumbers k such that 15*2^k - 1 is prime.at n=42A002237Primes which are a concatenation of some permutation of the first 5 primes.at n=2A177275a(n) is the number of interior points over all Motzkin polyominoes of length n.at n=9A369360Prime numbersat n=10901