96823domain: NPropertiesPrimalityPrimeyesAppears in sequencesA Fielder sequence. a(n) = a(n-1) + a(n-3) + a(n-4) + a(n-5), n >= 6.at n=21A001639Primes that remain prime through 3 iterations of function f(x) = 8x + 9.at n=32A023295Prime numbersat n=9322