Primes arising in A064205.

Terms

a(0) =2a(1) =5a(2) =19a(3) =263a(4) =373a(5) =1033a(6) =65551a(7) =123833a(8) =283553a(9) =292993a(10) =2197633a(11) =5778673a(12) =12795193a(13) =10500613a(14) =19980283a(15) =32213033a(16) =36978853a(17) =72494813a(18) =140724953a(19) =164119063a(20) =183105509a(21) =193710277a(22) =320210941a(23) =450065801a(24) =268354393a(25) =496922891a(26) =506906473a(27) =1333406021