Primes of the form k^6-k-1.

Terms

a(0) =61a(1) =4091a(2) =15619a(3) =46649a(4) =2985971a(5) =16777199a(6) =24137551a(7) =63999979a(8) =4750104199a(9) =8303765579a(10) =27680640569a(11) =30840979399a(12) =34296447191a(13) =68719476671a(14) =117648999929a(15) =351298031531a(16) =377149515539a(17) =606355001251a(18) =689869780961