A121210 -id:A121210 - cp's OEIS frontend

A123105 Number of benzenoids with 22 hexagons, C_(2h) symmetry and containing 2n carbon atoms.

Original entry on oeis.org

2, 32, 138, 510, 1627, 4641, 12646, 31360, 70888, 144276, 261789, 409747, 524600, 462848, 232842

Offset: 31

Parthasarathy Nambi, Sep 28 2006

G. Brinkmann, G. Caporossi and P. Hansen, A Survey and New Results on Computer Enumeration of Polyhex and Fusene Hydrocarbons, J. Chem. Inf. Comput. Sci., vol. 43 (2003) 842-851. See Table 5 column 6 on page 847.

Cf. A122539, A121964, A122736, A123044, A121210.

Sum_n a(n) = 2157946 = A121210(22). - Andrey Zabolotskiy, Nov 15 2023

Name and offset edited by Andrey Zabolotskiy, Nov 15 2023

A123277 Number of polyhexes with 24 hexagons, C_(2h) symmetry and containing 2n carbon atoms.

Original entry on oeis.org

18, 107, 427, 1490, 4590, 13298, 35971, 90268, 209337, 443940, 846043, 1440863, 2105423, 2482288, 2018188, 931601

Offset: 34

Parthasarathy Nambi, Oct 10 2006

G. Brinkmann, G. Caporossi and P. Hansen, A Survey and New Results on Computer Enumeration of Polyhex and Fusene Hydrocarbons, J. Chem. Inf. Comput. Sci., vol. 43 (2003) 842-851. See Table 7 column 6 on page 848.

Cf. A122539, A121964, A122736, A123044, A123106, A123105, A123104, A123142, A121210.

Sum_n a(n) = 10623852 = A121210(24). - Andrey Zabolotskiy, Nov 15 2023

Name and offset edited by Andrey Zabolotskiy, Nov 15 2023

A119708 Number of free hexagonal polygons of symmetry class D_(3h) and area n.

Original entry on oeis.org

0, 0, 1, 1, 0, 1, 1, 0, 1, 4, 0, 3, 4, 0, 3, 12, 0, 6, 19, 0, 10, 41, 0, 16, 72, 0, 28, 149, 0, 50, 72, 0, 87, 557, 0

Offset: 1

N. J. A. Sloane, Aug 27 2006

Markus Voege, Anthony J. Guttmann and Iwan Jensen, "On the number of benzenoid hydrocarbons", J. Chem. Inf. Comput. Sci., (2002), vol. 42, 456-466.

Cf. A121212, A121211, A121210, A120991.

A123141 Number of benzenoids with 23 hexagons, C_(2h) symmetry and containing 2n carbon atoms.

Original entry on oeis.org

6, 45, 145, 510, 1706, 4697, 12446, 32297, 73731, 147440, 274532, 454304, 594505, 514849, 245895

Offset: 33

Parthasarathy Nambi, Oct 01 2006

G. Brinkmann, G. Caporossi and P. Hansen, A Survey and New Results on Computer Enumeration of Polyhex and Fusene Hydrocarbons, J. Chem. Inf. Comput. Sci., vol. 43 (2003) 842-851. See Table 6 column 6 on page 847.

Cf. A122539, A121964, A122736, A123044, A123106, A123105, A123104, A121210.

Sum_n a(n) = 2357108 = A121210(23). - Andrey Zabolotskiy, Nov 15 2023

Name and offset edited by Andrey Zabolotskiy, Nov 15 2023

cp's OEIS Frontend

A123105 Number of benzenoids with 22 hexagons, C_(2h) symmetry and containing 2n carbon atoms.

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A123277 Number of polyhexes with 24 hexagons, C_(2h) symmetry and containing 2n carbon atoms.

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A119708 Number of free hexagonal polygons of symmetry class D_(3h) and area n.

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A123141 Number of benzenoids with 23 hexagons, C_(2h) symmetry and containing 2n carbon atoms.

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