282377domain: NPropertiesPrimalityPrimeyesAppears in sequencesNumber of ways, counted up to symmetry, to build a contiguous building with n LEGO blocks of size 2 X 4 which is symmetric after a rotation by 180 degrees.at n=6A123829Primes of the form triangular(p) + 1, where p is a prime.at n=27A231988Prime numbersat n=24632