Number of acyclic disubstituted alkanes with n carbon atoms and distinct substituents.

A005960

Number of acyclic disubstituted alkanes with n carbon atoms and distinct substituents.

Terms

    a(0) =1a(1) =3a(2) =8a(3) =23a(4) =69a(5) =208a(6) =636a(7) =1963a(8) =6099a(9) =19059a(10) =59836a(11) =188576a(12) =596252a(13) =1890548a(14) =6008908a(15) =19139155a(16) =61074583a(17) =195217253a(18) =624913284a(19) =2003090071a(20) =6428430129a(21) =20653101216a(22) =66420162952a(23) =213802390264a(24) =688796847976

External references