Sum of characteristic function of twin primes < 10^n.

A129951

Sum of characteristic function of twin primes < 10^n.

Terms

    a(0) =2a(1) =5a(2) =-30a(3) =-411a(4) =-4698a(5) =-45824a(6) =-428661a(7) =-4000209a(8) =-37149512a(9) =-345401797a(10) =-3220550623a(11) =-30125571140a(12) =-282726877353

External references