Nonsemiprimes in A306097 = A121707 \ A267999.

Terms

a(0) =2057a(1) =2873a(2) =3689a(3) =4015a(4) =4991a(5) =6137a(6) =6851a(7) =9401a(8) =10795a(9) =11033a(10) =11501a(11) =11837a(12) =11849a(13) =12341a(14) =12593a(15) =13481a(16) =13795a(17) =14297a(18) =15113a(19) =15695a(20) =17155a(21) =17633a(22) =18011a(23) =18377a(24) =18469a(25) =18941a(26) =19097a(27) =20009a(28) =21463a(29) =21641