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.

User: Michael Sollami

Michael Sollami's wiki page.

Michael Sollami has authored 8 sequences.

A207408 Number of connected triangle-free graphs on n nodes with edge chromatic number 3.

Original entry on oeis.org

0, 0, 0, 1, 4, 12, 27, 84, 212, 694, 2105, 7354, 25469, 95631, 364957
Offset: 1

Author

Michael Sollami, Feb 17 2012

Keywords

Crossrefs

Cf. A116079.

A207412 Number of connected triangle-free graphs on n nodes with edge chromatic number 6.

Original entry on oeis.org

0, 0, 0, 0, 0, 0, 1, 6, 57, 659, 10236, 204927, 5231080, 166394885, 6459372691
Offset: 1

Author

Michael Sollami, Feb 17 2012

Keywords

Crossrefs

A207411 Number of connected triangle-free graphs on n nodes with edge chromatic number 5.

Original entry on oeis.org

0, 0, 0, 0, 0, 1, 5, 38, 330, 3435, 41823, 614757, 10678281, 218040550, 5180904503
Offset: 1

Author

Michael Sollami, Feb 17 2012

Keywords

Crossrefs

Cf. A207410.

A207410 Number of connected triangle-free graphs on n nodes with edge chromatic number 4.

Original entry on oeis.org

0, 0, 0, 0, 1, 4, 25, 136, 772, 4953, 35340, 288335, 2632792, 26726855, 296550560
Offset: 1

Author

Michael Sollami, Feb 17 2012

Keywords

Crossrefs

Cf. A207408.

A205578 Number of n-node simple graphs having clique number 9.

Original entry on oeis.org

0, 0, 0, 0, 0, 0, 0, 0, 1, 9, 221, 14838, 3273685
Offset: 1

Author

Michael Sollami, Jan 29 2012

Keywords

Comments

Also, number of n-node simple graphs having independence number 9. - Andrew Howroyd, Oct 31 2017

Crossrefs

Column 9 of A263341.

Extensions

a(12) from Michael Sollami, Mar 26 2012
a(13) from Brendan McKay, May 07 2018

A205567 Number of 8-chromatic (i.e., chromatic number equals 8) simple graphs on n nodes.

Original entry on oeis.org

0, 0, 0, 0, 0, 0, 0, 1, 8, 165, 8214
Offset: 1

Author

Michael Sollami, Jan 28 2012

Keywords

Crossrefs

Column k=8 of A084268.

A205577 Number of n-node simple graphs having clique number 8.

Original entry on oeis.org

0, 0, 0, 0, 0, 0, 0, 1, 8, 164, 8165, 1184155, 462435257
Offset: 1

Author

Michael Sollami, Jan 29 2012

Keywords

Comments

Also, number of n-node simple graphs having independence number 8. - Andrew Howroyd, Oct 31 2017

Crossrefs

Extensions

a(12) from Michael Sollami, Mar 26 2012
a(13) from Brendan McKay, May 07 2018

A205568 Number of 9-chromatic (i.e., chromatic number equals 9) simple graphs on n nodes.

Original entry on oeis.org

0, 0, 0, 0, 0, 0, 0, 0, 1, 9, 222
Offset: 1

Author

Michael Sollami, Jan 28 2012

Keywords

Crossrefs

Column k=9 of A084268.