Beginning of last prime pattern of length n to appear among positive integers.

Terms

a(0) =4a(1) =8a(2) =9a(3) =24a(4) =25a(5) =90a(6) =91a(7) =114a(8) =143a(9) =143a(10) =205a(11) =205a(12) =1601a(13) =1601a(14) =2327a(15) =2327a(16) =5467a(17) =5467a(18) =18043a(19) =18043a(20) =29381a(21) =29381a(22) =90001a(23) =90001a(24) =3153569a(25) =3153569a(26) =3153569a(27) =3153569a(28) =4647259a(29) =4647259