Primes in A258978.

Terms

a(0) =5a(1) =2801a(2) =22621a(3) =30941a(4) =22621a(5) =637421a(6) =346201a(7) =346201a(8) =346201a(9) =2625641a(10) =837931a(11) =16007041a(12) =3835261a(13) =209102521a(14) =209102521a(15) =15018571a(16) =262209281a(17) =21700501a(18) =30397351a(19) =209102521a(20) =209102521a(21) =693025471a(22) =147753211a(23) =4244897281a(24) =1740422941a(25) =6903678241a(26) =2439903211