|
Search: id:A006360
|
|
|
| A006360 |
|
Antichains (or order ideals) in the poset 2*2*3*n or size of the distributive lattice J(2*2*3*n)
(Formerly M5300)
|
|
+0
9
|
|
| 1, 50, 887, 8790, 59542, 307960, 1301610, 4701698, 14975675, 43025762, 113414717, 277904900, 639562508, 1393844960, 2896063220, 5768600412, 11066514565, 20526933442, 36936277875, 64660182026, 110394412610
(list; graph; listen)
|
|
|
OFFSET
|
0,2
|
|
|
REFERENCES
|
J. Berman and P. Koehler, Cardinalities of finite distributive lattices, Mitteilungen aus dem Mathematischen Seminar Giessen, 121 (1976), 103-124.
Manfred Goebel, Rewriting Techniques and Degree Bounds for Higher Order Symmetric Polynomials, Applicable Algebra in Engineering, Communication and Computing (AAECC), Volume 9, Issue 6 (1999), 559-573.
G. Kreweras, Les preordres totaux compatibles avec un ordre partiel. Math. Sci. Humaines No. 53 (1976), 5-30.
|
|
LINKS
|
Index entries for sequences related to posets
|
|
MATHEMATICA
|
MatrixPower[ ZetaP[ #, n + 1 ][ [ 1, Card[ # ] ] ]&@JofP[ Chain[ 2, 2, 3 ] ]
|
|
CROSSREFS
|
Cf. A000217, A000330, A050446, A050447, A006356, A006357, A006358, A006359, A000372, A056932, A006361, A006362, A056933, A056934, A056935, A056936, A056937.
Sequence in context: A086027 A110929 A101929 this_sequence A112890 A017766 A035720
Adjacent sequences: A006357 A006358 A006359 this_sequence A006361 A006362 A006363
|
|
KEYWORD
|
nonn,easy
|
|
AUTHOR
|
njas
|
|
EXTENSIONS
|
More terms from Mitch Harris (Harris.Mitchell(AT)mgh.harvard.edu), Jul 16 2000
|
|
|
Search completed in 0.002 seconds
|
