Numbers of the form (2^(2*j + 6*k + 5) - 2^(2*j + 1) - 3)/9, with j,k >= 0.

Terms

a(0) =3a(1) =13a(2) =53a(3) =213a(4) =227a(5) =853a(6) =909a(7) =3413a(8) =3637a(9) =13653a(10) =14549a(11) =14563a(12) =54613a(13) =58197a(14) =58253a(15) =218453a(16) =232789a(17) =233013a(18) =873813a(19) =931157a(20) =932053a(21) =932067a(22) =3495253a(23) =3724629a(24) =3728213a(25) =3728269a(26) =13981013a(27) =14898517a(28) =14912853a(29) =14913077