a(n) = Sum_{k=1..n} prime(k)^prime(n-k+1).

A087316

a(n) = Sum_{k=1..n} prime(k)^prime(n-k+1).

Terms

    a(0) =4a(1) =17a(2) =84a(3) =545a(4) =7824a(5) =281771a(6) =51540600a(7) =3347558057

External references