Smallest prime of the form (n^k-1)/(n-1), or 0 if no such prime exists.

Terms

a(0) =3a(1) =13a(2) =5a(3) =31a(4) =7a(5) =2801a(6) =73a(7) =0a(8) =11a(10) =13a(11) =30941a(12) =211a(13) =241a(14) =17a(15) =307a(16) =19a(18) =421a(19) =463a(20) =23a(21) =292561a(22) =601a(23) =0a(24) =321272407a(25) =757a(26) =29a(27) =732541a(28) =31a(29) =917087137a(30) =0a(31) =1123