cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

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A137858 Number of unlabeled graphs with n nodes and an even sum of nodes and edges.

Original entry on oeis.org

0, 1, 2, 6, 16, 78, 522, 6178, 137316, 6002584, 509498932, 82545586656, 25251015681176, 14527077828617744, 15713242984902154384, 32000507852263779299344, 122967932076766466336249888
Offset: 1

Views

Author

Tanya Khovanova, Apr 29 2008

Keywords

Comments

a(n) = A054960(n) for odd n and A007869(n) for even n.

Crossrefs

Cf. A054960 Number of unlabeled graphs with n nodes and an odd number of edges. A007869 Complementary pairs of graphs on n nodes. Also unlabeled graphs with n nodes and an even number of edges.

A137861 Number of unlabeled graphs with n nodes and an odd sum of nodes and edges.

Original entry on oeis.org

1, 1, 2, 5, 18, 78, 522, 6168, 137352, 6002584, 509498932, 82545585936, 25251015686776, 14527077828617744, 15713242984902154384, 32000507852263778595584, 122967932076766466347469888
Offset: 1

Views

Author

Tanya Khovanova, Apr 29 2008

Keywords

Comments

a(n) = A054960(n) for even n and A007869(n) for odd n.

Crossrefs

Cf. A054960 Number of unlabeled graphs with n nodes and an odd number of edges. A007869 Complementary pairs of graphs on n nodes. Also unlabeled graphs with n nodes and an even number of edges.
Previous Showing 11-12 of 12 results.

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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