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A338867
Related to the number of Hopf subalgebras of heap-preordered forests of vertex degree n.
0
1, 1, 5, 38, 424, 6284
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OFFSET
0,3
COMMENTS
It would be nice to have a more precise definition.
LINKS
Table of n, a(n) for n=0..5.
A. Mansuy,
Preordered forests, packed words and contraction algebras
, J. Algebra 411 (2014) 259-311, Section 3.1.
CROSSREFS
Sequence in context:
A069471
A355788
A216858
*
A110467
A221845
A299054
Adjacent sequences:
A338864
A338865
A338866
*
A338868
A338869
A338870
KEYWORD
nonn
,
more
AUTHOR
R. J. Mathar
, Nov 13 2020
STATUS
approved
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Last modified September 14 13:32 EDT 2024. Contains 375921 sequences. (Running on oeis4.)