Numbers with an increasing number of non-residues (moduli).

Terms

a(0) =1a(1) =3a(2) =4a(3) =7a(4) =8a(5) =12a(6) =15a(7) =16a(8) =20a(9) =24a(10) =28a(11) =32a(12) =36a(13) =40a(14) =44a(15) =45a(16) =48a(17) =56a(18) =60a(19) =64a(20) =72a(21) =80a(22) =88a(23) =96a(24) =104a(25) =108a(26) =112a(27) =120a(28) =128a(29) =132