A036673 Number of stereoisomers of all n-node acyclic hydrocarbons with no triple bonds.
1, 2, 3, 9, 20, 64, 205, 747, 2767, 10850, 43254, 176990, 735007, 3099272, 13220407, 57001841, 248009246, 1087947441, 4807232915, 21381055533, 95660032110, 430298114499, 1945096434552, 8832200860663, 40271358004756, 184325394540531, 846667179332120
Offset: 1
Keywords
Links
- Sean A. Irvine, Java program (github)
- Sean A. Irvine, Correction of A036672(10) and A036673(10), 2020
- R. C. Read, The Enumeration of Acyclic Chemical Compounds, pp. 25-61 of A. T. Balaban, ed., Chemical Applications of Graph Theory, Ac. Press, 1976. [Annotated scanned copy] See p. 60.
Crossrefs
Cf. A000628 (steric quartic trees with no double edges).
Extensions
Name clarified by Natan Arie Consigli, Jun 30 2017
a(10) corrected and more terms from Sean A. Irvine, Nov 20 2020
Comments