a(n) is the smallest prime such that a(1), ..., a(n-1) are squares mod a(n).

Terms

a(0) =2a(1) =7a(2) =31a(3) =113a(4) =233a(5) =647a(6) =1487a(7) =4919a(8) =6329a(9) =7951a(10) =26833a(11) =47737a(12) =53623a(13) =128959a(14) =135697a(15) =142327a(16) =1312777a(17) =3178289a(18) =6061607a(19) =26564393a(20) =32426081a(21) =102958417a(22) =209074609a(23) =323901311a(24) =587709359a(25) =1006009759a(26) =1029482303a(27) =9876033449a(28) =11061524183a(29) =15821898167