Total walk count of molecular graphs for linear alkanes with n carbon atoms.

Terms

a(0) =0a(1) =1a(2) =5a(3) =16a(4) =44a(5) =111a(6) =268a(7) =627a(8) =1439a(9) =3250a(10) =7259a(11) =16050a(12) =35219a(13) =76730a(14) =166229a(15) =358180a(16) =768416a(17) =1641555a(18) =3494596a(19) =7414203a(20) =15685328a(21) =33091399a(22) =69647978a(23) =146250009a(24) =306490602a(25) =641044849a(26) =1338507476a(27) =2790140995a(28) =5807567462a(29) =12070739253