172741domain: NPropertiesPrimalityPrimeyesAppears in sequencesClass 9- primes.at n=7A081428a(0)=1, a(1)=5; for n > 2, a(n) is the smallest odd number j not divisible by 3 such that (3*j+1)/2^k = a(n-1) for some k.at n=21A327638Prime numbersat n=15734