Prime differences of tribonacci numbers.

Terms

a(0) =2a(1) =3a(2) =5a(3) =11a(4) =17a(5) =23a(6) =31a(7) =37a(8) =43a(9) =79a(10) =193a(11) =491a(12) =503a(13) =653a(14) =883a(15) =1201a(16) =10607a(17) =19009a(18) =19469a(19) =19489a(20) =34963a(21) =35809a(22) =46499a(23) =223273a(24) =223313a(25) =391231a(26) =409817a(27) =410731a(28) =532159a(29) =634061