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A217944
Number of different lattices formed by intersections of two composition series of length n.
2
1, 1, 2, 5, 17, 73, 397, 2623, 20414, 181607, 1809104, 19886032, 238723606
(list; graph; refs; listen; history; text; internal format)
OFFSET
0,3
COMMENTS
For computer programs and tables of first 100 terms of A217944 and A217945 see the authors' web sites.
LINKS
Table of n, a(n) for n=0..12.
Gábor Czédli, László Ozsvárt, and Balázs Udvari, How many ways can two composition series intersect?, Discrete Math. 312 (2012), no. 24, 3523--3536. MR2979481.
CROSSREFS
Cf. A217945.
Sequence in context: A102038 A002135 A260337 * A007868 A136726 A112831
Adjacent sequences: A217941 A217942 A217943 * A217945 A217946 A217947
KEYWORD
nonn,more
AUTHOR
N. J. A. Sloane, Nov 07 2012
STATUS
approved

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Last modified November 7 19:25 EST 2024. Contains 377536 sequences.
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