Primes in A342604.

Terms

a(0) =2a(1) =5a(2) =17a(3) =821a(4) =2851a(5) =8291a(6) =12583a(7) =32213a(8) =64567a(9) =193283a(10) =481409a(11) =507979a(12) =2889443a(13) =3026911a(14) =15233891a(15) =24430993a(16) =95635361a(17) =95754697a(18) =221519339a(19) =1147397567a(20) =12921783863a(21) =28711457651a(22) =63521027291a(23) =305580335353