Smallest number k >= A000043(n) such that k*A000668(n)*(k*A000668(n)+1)-1 is prime.

Terms

a(0) =2a(1) =3a(2) =5a(3) =7a(4) =25a(5) =19a(6) =20a(7) =42a(8) =96a(9) =190a(10) =134a(11) =164a(12) =650a(13) =852a(14) =1455a(15) =2765a(16) =2480a(17) =3960a(18) =5464a(19) =6694a(20) =17206a(21) =13118a(22) =13680a(23) =28481a(24) =27445a(25) =28821a(26) =101696a(27) =116232a(28) =142083a(29) =187376