binomial(2n,n) - (2n)^pi(n), where pi(n) is the number of primes <= n.

A220314

binomial(2n,n) - (2n)^pi(n), where pi(n) is the number of primes <= n.

Terms

    a(0) =1a(1) =2a(2) =-16a(3) =6a(4) =-748a(5) =-804a(6) =-34984a(7) =-52666a(8) =-56356a(9) =24756a(10) =-4448200a(11) =-5258468a(12) =-298515176a(13) =-441773704a(14) =-573882480a(15) =-472661434a(16) =-50189743924a(17) =-69289028796

External references