Numbers k such that A003422(k+1)/2 is prime.

Terms

a(0) =2a(1) =3a(2) =4a(3) =7a(4) =8a(5) =9a(6) =10a(7) =29a(8) =75a(9) =162a(10) =270a(11) =272a(12) =353a(13) =720a(14) =1795a(15) =3732a(16) =4768a(17) =9315a(18) =12220a(19) =41531