Numbers of the form k^3+k^2+k+1 that are the product of two distinct primes.

Terms

a(0) =15a(1) =85a(2) =259a(3) =1111a(4) =4369a(5) =47989a(6) =65641a(7) =291919a(8) =2016379a(9) =2214031a(10) =3397651a(11) =3820909a(12) =5864581a(13) =9305311a(14) =13881841a(15) =15687751a(16) =16843009a(17) =19756171a(18) =22030681a(19) =28746559a(20) =62256349a(21) =64160401a(22) =74264821a(23) =79692331a(24) =101412319a(25) =117889591a(26) =172189309a(27) =185518471a(28) =191435329a(29) =270004099