Pisot sequence L(4,14).

Terms

a(0) =4a(1) =14a(2) =49a(3) =172a(4) =604a(5) =2122a(6) =7456a(7) =26198a(8) =92052a(9) =323444a(10) =1136489a(11) =3993295a(12) =14031289a(13) =49301911a(14) =173232725a(15) =608689936a(16) =2138761243a(17) =7514991434a(18) =26405516950a(19) =92781386582a(20) =326007088306