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 1-3 of 3 results.

A331156 Number of (weakly) connected gluing-parallel or GP-posets with n points.

Original entry on oeis.org

1, 1, 1, 3, 10, 44, 233
Offset: 0

Views

Author

N. J. A. Sloane, Jan 16 2020, following a suggestion from Michael De Vlieger

Keywords

Crossrefs

The seven sequences in the table of Uli Fahrenberg et al., 2019, are A000112, A003430, A079566, A331156, A331157, A331158, A331159.

Extensions

Typo in a(6) corrected by Uli Fahrenberg, Feb 03 2024

A331157 Number of iposets (posets with interfaces) with starting interfaces only, with n points.

Original entry on oeis.org

1, 2, 5, 16, 66, 350
Offset: 0

Views

Author

N. J. A. Sloane, Jan 16 2020, following a suggestion from Michael De Vlieger

Keywords

Crossrefs

The seven sequences in the table of Uli Fahrenberg et al., 2019, are A000112, A003430, A079566, A331156, A331157, A331158, A331159.

A331159 Number of GP-iposets (gluing-parallel posets with interfaces) with n points.

Original entry on oeis.org

1, 4, 16, 74, 419, 2980, 26566, 289279, 3726311
Offset: 0

Views

Author

N. J. A. Sloane, Jan 16 2020, following a suggestion from Michael De Vlieger

Keywords

Crossrefs

The seven sequences in the table of Uli Fahrenberg et al., 2019, are A000112, A003430, A079566, A331156, A331157, A331158, A331159.

Extensions

a(7)-a(8) from Uli Fahrenberg, Jun 22 2021
Showing 1-3 of 3 results.