a(n) is the absolute value of p minus A004086(p), where (p-2,p) is the n-th pair of twin primes.

Terms

a(0) =0a(1) =0a(2) =18a(3) =72a(4) =18a(5) =9a(6) =45a(7) =36a(8) =198a(9) =792a(10) =792a(11) =0a(12) =0a(13) =198a(14) =792a(15) =693a(16) =99a(17) =99a(18) =99a(19) =0a(20) =594a(21) =297a(22) =99a(23) =99a(24) =198a(25) =396a(26) =495a(27) =297a(28) =297a(29) =495