(1/p)*(binomial(2p,p)-2^p) as p runs through the primes.

A087813

(1/p)*(binomial(2p,p)-2^p) as p runs through the primes.

Terms

    a(0) =1a(1) =4a(2) =44a(3) =472a(4) =63944a(5) =799416a(6) =137263244a(7) =1860249448a(8) =357974884304

External references