Alternating sum of twin primes (A001097).

Terms

a(0) =3a(1) =-2a(2) =5a(3) =-6a(4) =7a(5) =-10a(6) =9a(7) =-20a(8) =11a(9) =-30a(10) =13a(11) =-46a(12) =15a(13) =-56a(14) =17a(15) =-84a(16) =19a(17) =-88a(18) =21a(19) =-116a(20) =23a(21) =-126a(22) =25a(23) =-154a(24) =27a(25) =-164a(26) =29a(27) =-168a(28) =31a(29) =-196