STATUS
editing
approved
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Revision History for A263864
(Bold, blue-underlined text is an addition; faded, red-underlined text is aShowing entries 1-10 | older changes
Triangle read by rows: T(n,k) (n>=1, k>=1) is the number of posets with n elements whose Hasse diagram has k connected components.
(history; published version)
(history; published version)
LINKS
Alois P. Heinz, <a href="/A263864/b263864.txt">Rows n = 1..16, flattened</a>
STATUS
approved
editing
STATUS
proposed
approved
STATUS
editing
proposed
EXAMPLE
1,;
1, 1,;
3, 1, 1,;
10, 4, 1, 1,;
44, 13, 4, 1, 1,;
...
...
STATUS
proposed
editing
STATUS
editing
proposed
LINKS
Salah Uddin Mohammad, Md. Shah Noor, and Md. Rashed Talukder, <a href="https://cs.uwaterloo.ca/journals/JIS/VOL25/Uddin/uddin6.html">An Exact Enumeration of the Unlabeled Disconnected Posets</a>, J. Int. Seq., Vol. 25 (2022), Article 22.5.4.
STATUS
approved
editing
STATUS
editing
approved
EXTENSIONS
More terms from R. J. Mathar, Jul 12 2020
DATA
1, 1, 1, 3, 1, 1, 10, 4, 1, 1, 44, 13, 4, 1, 1, 238, 60, 14, 4, 1, 1, 1650, 312, 63, 14, 4, 1, 1, 14512, 2075, 328, 64, 14, 4, 1, 1, 163341, 17316, 2159, 331, 64, 14, 4, 1, 1, 2360719, 186173, 17801, 2175, 332, 64, 14, 4, 1, 1, 43944974, 2594568, 189406, 17885, 2178, 332, 64, 14, 4, 1, 1, 1055019099, 47041877, 2620368, 189906, 17901, 2179, 332, 64, 14, 4, 1, 1, 32664984238, 1108710868, 47298156, 2623701, 189990, 17904, 2179, 332, 64, 14, 4, 1, 1
LINKS
<a href="/index/Pos#posets">Index entries for sequences related to posets</a>