1806803domain: NPropertiesPrimalityPrimeyesAppears in sequencesA 2nd-order recursion: a(1)=a(2)=1; a(n) = prime(a(n-1)) + primepi(a(n-2)) = A000040(a(n-1)) + A000720(a(n-2)).at n=11A082094Prime numbersat n=135545