43939561domain: NPropertiesPrimalityPrimeyesAppears in sequencesa(n) = 90*binomial(n,6) + 90*binomial(n,5) + 54*binomial(n,4) + 24*binomial(n,3) + 9*binomial(n,2) + 3*n + 1.at n=28A382640Prime numbersat n=2657878