login
A345024
a(n) is the number of maximal chains of labeled chordal graphs with n vertices.
2
1, 1, 6, 576, 1416960, 120678543360, 455010170456862720, 95371866538619173904056320, 1383866987105877308750365304858542080, 1716187027583005555045945024371317843956845772800, 221917018834976627508152930913765491170568412125060985539788800, 3598055237740601485367382153175891099609454479883844294426214728495086488780800
OFFSET
1,3
COMMENTS
a(n) is the number of sequences G[0], G[1], ..., G[n(n-1)/2] where each G[i] is a chordal graph with i edges and G[i] is a subgraph of G[i+1] for each i. All graphs are labeled.
LINKS
CROSSREFS
Cf. A058862.
Sequence in context: A225206 A268207 A268247 * A134367 A255886 A300389
KEYWORD
nonn,hard
AUTHOR
Brendan McKay, Jun 05 2021
STATUS
approved