Smallest prime of form (n+1)^k-n^k.

Terms

a(0) =3a(1) =5a(2) =7a(3) =61a(4) =11a(5) =13a(6) =1273609a(7) =17a(8) =19a(9) =331a(10) =23a(12) =547a(13) =29a(14) =31a(15) =371281a(16) =919a(17) =37a(18) =723901a(19) =41a(20) =43