349567domain: NPropertiesPrimalityPrimeyesAppears in sequencesa(n) = a(n-2) + 2^(n-1) + 5 for n>3, a(0..3) = (0,1,2,7).at n=19A147672Number of zeros in n-th even perfect number written in base 16.at n=34A161496Prime numbersat n=29942