Pisot sequence L(4,9).

Terms

a(0) =4a(1) =9a(2) =21a(3) =49a(4) =115a(5) =270a(6) =634a(7) =1489a(8) =3498a(9) =8218a(10) =19307a(11) =45359a(12) =106565a(13) =250361a(14) =588192a(15) =1381884a(16) =3246565a(17) =7627402a(18) =17919636a(19) =42099965a(20) =98908653a(21) =232373629a(22) =545933059a(23) =1282602102a(24) =3013314774a(25) =7079409829a(26) =16632196530a(27) =39075285666a(28) =91802543767a(29) =215678705823