a(n) is the smallest k such that prime(k), prime(k+1), ..., prime(k+n-1) all have 10 as a primitive root, but prime(k-1) and prime(k+n) do not.

A060262

a(n) is the smallest k such that prime(k), prime(k+1), ..., prime(k+n-1) all have 10 as a primitive root, but prime(k-1) and prime(k+n) do not.

Terms

    a(0) =4a(1) =17a(2) =55a(3) =7a(4) =93a(5) =754a(6) =2611a(7) =31092a(8) =55207a(9) =301252a(10) =955428a(11) =805428a(12) =3651249a(13) =3686621a(14) =5510710a(15) =42337888a(16) =109670084a(17) =590903433a(18) =1010572448

External references