Squarefree numbers of the form k^2 + k + 1 such that k^2 + k + 2 is also squarefree.

Terms

a(0) =1a(1) =13a(2) =21a(3) =57a(4) =73a(5) =133a(6) =157a(7) =273a(8) =381a(9) =421a(10) =553a(11) =601a(12) =757a(13) =813a(14) =993a(15) =1261a(16) =1333a(17) =1561a(18) =1641a(19) =1893a(20) =1981a(21) =2257a(22) =2353a(23) =2653a(24) =2757a(25) =3081a(26) =3193a(27) =3541a(28) =3661a(29) =4033