A130016 Number of isomers for different number of substitutions of hydrogen atoms by deuterium in the chair form of cyclohexane.

1, 2, 10, 24, 54, 76, 96, 76, 54, 24, 10, 2, 1

Offset

0,2

Comments

See Eq. 6 in the paper by Pevac and Crundwell for details.

Links

Table of n, a(n) for n=0..12.

S. Pevac and G. Crundwell, Polya's Isomer Enumeration Method: A Unique Exercise in Group Theory and Combinatorial Analysis for Undergraduates, J. Chem. Educ., Vol. 77 (2000), pp. 1358-1360.

Example

There are 2 isomers with one deuterium in the chair form of cyclohexane.
There are 96 isomers with six deuteriums in the chair form of cyclohexane.
There are 10 isomers with ten deuteriums in the chair form of cyclohexane.

Crossrefs

Cf. A130015.

Sequence in context: A092906 A244383 A295053 * A120550 A233266 A222848

Adjacent sequences: A130013 A130014 A130015 * A130017 A130018 A130019

Keyword

fini,full,nonn

Author

Parthasarathy Nambi, Jul 31 2007, Aug 03 2007

Extensions

Presumably A130015 and this sequence are simply rows in two (possibly identical) triangles. It would be nice to have the sequences corresponding to these triangles. - N. J. A. Sloane, Aug 03 2007

Status

approved