Semiprimes k such that none of k-2, k-1, k+1, and k+2 is squarefree.

Terms

a(0) =26a(1) =362a(2) =926a(3) =1027a(4) =1126a(5) =1574a(6) =1774a(7) =1814a(8) =2059a(9) =2402a(10) =3482a(11) =3574a(12) =4166a(13) =4474a(14) =5042a(15) =5045a(16) =5374a(17) =5426a(18) =5914a(19) =6274a(20) =6326a(21) =6418a(22) =6626a(23) =6649a(24) =7226a(25) =7694a(26) =7985a(27) =8182a(28) =8674a(29) =9026