A121188 Alkane systems (see Cyvin reference for precise definition).

1, 1, 1, 3, 6, 18, 44, 129, 354, 1040, 2961, 8662, 25022, 73005, 211723, 616522, 1789320, 5203258, 15097067

Offset

1,4

Links

Table of n, a(n) for n=1..19.

S. J. Cyvin, B. N. Cyvin, J. Brunvoll, and J. Wang, Enumeration of staggered conformers of alkanes and monocyclic cycloalkanes, J. Molec. Struct., 445 (1998), 127-137. See Table 3, unbranched, column "Stereo-isomers".

S. J. Cyvin, Jianji Wang, J. Brunvoll, Shiming Cao, Ying Li, B. N. Cyvin, and Yugang Wang, Staggered conformers of alkanes: complete solution of the enumeration problem, J. Molec. Struct. 413-414 (1997), 227-239. See Table 6, unbranched, column "Stereo-isomers".

Crossrefs

Sequence in context: A007990 A197050 A354387 * A331678 A120718 A032120

Adjacent sequences: A121185 A121186 A121187 * A121189 A121190 A121191

Keyword

nonn,more

Author

N. J. A. Sloane, Aug 17 2006

Status

approved