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URL: https://oeis.org/A331157

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A331157
Number of iposets (posets with interfaces) with starting interfaces only, with n points.
4
1, 2, 5, 16, 66, 350
OFFSET
0,2
LINKS
Uli Fahrenberg, Christian Johansen, Georg Struth, Ratan Bahadur Thapa, Generating Posets Beyond N, arXiv:1910.06162 [cs.FL], 2019.
CROSSREFS
The seven sequences in the table of Uli Fahrenberg et al., 2019, are A000112, A003430, A079566, A331156, A331157, A331158, A331159.
Sequence in context: A091139 A084785 A124551 * A005157 A340021 A019502
KEYWORD
nonn,more
AUTHOR
N. J. A. Sloane, Jan 16 2020, following a suggestion from Michael De Vlieger
STATUS
approved