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 1-4 of 4 results.

A287204 Number of independent vertex sets and vertex covers in the n-triangular honeycomb acute knight graph.

Original entry on oeis.org

2, 8, 27, 144, 1331, 13824, 208575, 4741632, 140608000, 5870657088, 350253538649, 28635764824584, 3270761581689147, 524882236329014264, 117025388905265182783, 36405238728128712859232, 15833111238624255435917875, 9599917578598545475054063616
Offset: 1

Views

Author

Eric W. Weisstein, May 21 2017

Keywords

Comments

Also row sums of A244500.

Links

Crossrefs

Cf. A244500 (coefficients of independence polynomial of triangular honeycomb acute knight graphs).
Cf. A287195, A289902, A287230, A287229, A027740.

Extensions

a(15)-a(18) from Andrew Howroyd, Jul 17 2017

A289904 Number of edge covers in the n-triangular honeycomb acute knight graph.

Original entry on oeis.org

0, 0, 1, 16, 4913, 13481272, 272624565213, 43591165915025672, 54987285852263666792584, 546490452644177272846400450304, 42801199124555963417196629935933733033, 26416976791435052534725445524174519235494961992
Offset: 1

Views

Author

Eric W. Weisstein, Jul 14 2017

Keywords

Links

  • Eric Weisstein's World of Mathematics, Edge Cover

Crossrefs

Cf. A287230, A289906.

Extensions

a(10)-a(12) from Andrew Howroyd, Dec 26 2017

A287228 Number of matchings in the n-triangular honeycomb obtuse knight graph.

Original entry on oeis.org

1, 1, 1, 27, 2376, 298062, 66426798, 47833036802, 119487298588717, 857547047985463278
Offset: 1

Views

Author

Eric W. Weisstein, May 22 2017

Keywords

Links

Crossrefs

Cf. A287229, A287230.

Extensions

a(9)-a(10) from Andrew Howroyd, Jul 17 2017

A321486 Number of maximal matchings in the n-triangular honeycomb acute knight graph.

Original entry on oeis.org

1, 1, 1, 27, 125, 1728, 76050, 4330747, 485587656, 108023929951, 43807783923008, 32822096942411776, 46378235999539384346, 122583565496980110411000
Offset: 1

Views

Author

Eric W. Weisstein, Nov 11 2018

Keywords

Links

Crossrefs

Cf. A287230, A289143.

Extensions

a(9) from Andrew Howroyd, Nov 11 2018
a(10)-a(14) from Eric W. Weisstein, Jan 26 2024
Showing 1-4 of 4 results.

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

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