Smallest prime == 1 (mod f(n)), where f(n) = concatenation n,n-1,...,3,2,1.

A109948

Smallest prime == 1 (mod f(n)), where f(n) = concatenation n,n-1,...,3,2,1.

Terms

    a(0) =2a(1) =43a(2) =643a(3) =51853a(4) =108643a(5) =3925927a(6) =45925927a(7) =525925927a(8) =9876543211a(9) =65925925927

External references