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.

Showing 1-2 of 2 results.

A243391 Number of isomorphism classes of connected 3-regular loopless multigraphs with n vertices and with semi-edges allowed.

Original entry on oeis.org

1, 3, 4, 12, 22, 68, 166, 534, 1589, 5464, 18579, 68320, 255424, 1000852, 4018156, 16671976, 70890940, 309439942, 1381815168, 6310880471, 29428287639, 140012980007, 678970863717, 3353545264060, 16857749613964, 86191265140699, 447951112379963, 2365177154077186
Offset: 1

Views

Author

Nico Van Cleemput, Jun 04 2014

Keywords

Comments

a(n) is also the number of isomorphism classes of connected loopless multigraphs with n vertices of degree 3 or less. - Andrew Howroyd, Mar 20 2020

Links

Crossrefs

Column k=3 of A334546.
Cf. A000421, A243392, A243393, A243394, A303030.

Extensions

a(23)-a(28) from Andrew Howroyd, Mar 20 2020

A243393 Number of isomorphism classes of connected 3-regular loopless simple graphs with n vertices and with semi-edges allowed.

Original entry on oeis.org

1, 1, 2, 6, 10, 29, 64, 194, 531, 1733, 5524, 19430, 69322, 262044, 1016740, 4101318, 16996157, 72556640, 317558689, 1424644848, 6536588420, 30647561117, 146647344812, 715511358833, 3556531372395, 17996244725780, 92634418530686, 484756161038264
Offset: 1

Views

Author

Nico Van Cleemput, Jun 04 2014

Keywords

Comments

Also: number of isomorphism classes of connected loopless simple graphs with maximum degree at most 3. - Brendan McKay, Mar 11 2020

Links

Crossrefs

Cf. A121941, A243391, A243392, A243394, A303032.

Extensions

a(24)-a(28) from Andrew Howroyd, Mar 20 2020
Showing 1-2 of 2 results.

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