250951domain: NPropertiesPrimalityPrimeyesAppears in sequencesNumber of planar n X n X n binary triangular grids with no more than 2 ones in any similarly oriented 4 X 4 X 4 subtriangle.at n=8A153556List of primes p for which p^n - 2 is prime for n = 1, 3, and 5.at n=22A242517Prime numbersat n=22110