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A376064
Number of quasi-orders on an n-set that are not partial orders.
0
0, 0, 1, 10, 136, 2711, 79504, 3405382, 211055975, 18749246912, 2365988624260, 420564361630293, 104490620009920522, 36030665275081893690, 17132727719926060775277, 11169098098145556139435182, 9930583626219881751366237516, 11985408843042557809380587456695, 19553143146433198202168306753032180
OFFSET
0,4
FORMULA
a(n) = A000798(n) - A001035(n).
MATHEMATICA
a[n_]:=Part[ResourceFunction["OEISSequence"]["A000798"], n+1]-Part[ResourceFunction["OEISSequence"]["A001035"], n+1]; Array[a, 18, 0] (* Stefano Spezia, Sep 08 2024 *)
CROSSREFS
Sequence in context: A371405 A261503 A096619 * A276131 A003377 A371394
KEYWORD
nonn
AUTHOR
Firdous Ahmad Mala, Sep 08 2024
STATUS
approved