First difference of A293666.

Terms

a(0) =2a(1) =3a(2) =5a(3) =-7a(4) =11a(5) =-13a(6) =17a(7) =19a(8) =-31a(9) =23a(10) =29a(11) =-47a(12) =37a(13) =-41a(14) =43a(15) =53a(16) =-83a(17) =59a(18) =-71a(19) =61a(20) =67a(21) =-127a(22) =73a(23) =79a(24) =-157a(25) =89a(26) =97a(27) =-173a(28) =101a(29) =-103