Number of non-stereoisomeric paraffins with n carbon atoms.

Terms

a(0) =1a(1) =1a(2) =1a(3) =2a(4) =3a(5) =5a(6) =7a(7) =13a(8) =20a(9) =35a(10) =55a(11) =96a(12) =156a(13) =267a(14) =438a(15) =747a(16) =1239a(17) =2099a(18) =3498a(19) =5912a(20) =9890a(21) =16677a(22) =27951a(23) =47084a(24) =79019a(25) =133003a(26) =223373a(27) =375824a(28) =631477a(29) =1062160