a(n) = a(n-1) + 3*a(n-2) -2*a(n-3) - 2*a(n-4), where a(0) = 1, a(1) = 3, a(2) = 5, a(3) = 7.

Terms

a(0) =1a(1) =3a(2) =5a(3) =7a(4) =14a(5) =19a(6) =37a(7) =52a(8) =97a(9) =141a(10) =254a(11) =379a(12) =665a(13) =1012a(14) =1741a(15) =2689a(16) =4558a(17) =7119a(18) =11933a(19) =18796a(20) =31241a(21) =49525a(22) =81790a(23) =130291a(24) =214129a(25) =342372a(26) =560597a(27) =898873a(28) =1467662a(29) =2358343