Record prime numbers for A228098.

Terms

a(0) =2a(1) =3a(2) =7a(3) =113a(4) =1069a(5) =3271a(6) =6917a(7) =12853a(8) =31397a(9) =223151a(10) =338033a(11) =370261a(12) =8917523a(13) =20388583a(14) =37305713a(15) =2433630109a(16) =18562236551a(17) =53153925667a(18) =75505974031a(19) =190721857463a(20) =595999647599