Indices of squares (of primes) in the semiprimes.

Terms

a(0) =1a(1) =3a(2) =9a(3) =17a(4) =40a(5) =56a(6) =90a(7) =114a(8) =164a(9) =253a(10) =289a(11) =404a(12) =484a(13) =533a(14) =634a(15) =783a(16) =973a(17) =1031a(18) =1233a(19) =1373a(20) =1452a(21) =1683a(22) =1842a(23) =2112a(24) =2483a(25) =2676a(26) =2779a(27) =2995a(28) =3108a(29) =3320