Primes in A238399.

Terms

a(0) =2a(1) =3a(2) =7a(3) =1237a(4) =66067a(5) =525593a(6) =974167a(7) =1412473a(8) =2675759a(9) =4471237a(10) =5264333a(11) =8107961a(12) =8308271a(13) =12615151a(14) =20145407a(15) =34926433a(16) =43167569a(17) =94772749a(18) =104612297a(19) =115103327a(20) =144450221a(21) =153124973a(22) =165108557a(23) =196634723a(24) =211696049a(25) =213507241a(26) =255963131a(27) =263979101