237977domain: NPropertiesPrimalityPrimeyesAppears in sequencesPrimes p for which p^i - 4 is prime for i = 1, 3 and 5.at n=29A243818Number of 3-dimensional tilings of a 2 X 2 X n box using 1 X 1 X 1 cubes and trominos (L-shaped connection of 3 cubes).at n=5A360064Prime numbersat n=21054