A331158 Number of iposets (posets with interfaces) with n points.

1, 4, 17, 86, 532, 4068, 38933, 474822, 7558620

Offset: 0

Author

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

Keywords

• nonn
• more

Links

• Uli Fahrenberg, Christian Johansen, Georg Struth, Ratan Bahadur Thapa, Generating Posets Beyond N, arXiv:1910.06162 [cs.FL], 2019.
• Uli Fahrenberg, Christian Johansen, Georg Struth, Krzysztof Ziemiański, Posets with Interfaces for Concurrent Kleene Algebra, arxiv:2106.10895 [cs.FL], 2021.

Crossrefs

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

Extensions

a(5)-a(8) from Uli Fahrenberg, Jun 22 2021