132047domain: NPropertiesPrimalityPrimeyesAppears in sequencesLesser of Twin prime numbers of the form : i^2+j^3, as sum of square and cube, if Greater Twin prime number also of the form : i^2+j^3, as sum of square and cube.at n=21A143799a(n) = A000043(n)-2.at n=29A153798Primes p such that sigma(2^(p+1)) is prime.at n=9A278053Prime numbersat n=12330