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A152093
Numbers of intervals for the pruning-grafting lattices of size n.
5
1, 3, 15, 101, 818, 7486, 74648, 793005, 8843056, 102464586
OFFSET
1,2
LINKS
J. L. Baril and J. M. Pallo, The pruning-grafting lattice of binary trees, Theoretical Computer Science, 409, 2008, 382-393.
CROSSREFS
Sequence in context: A196962 A074521 A074536 * A109777 A242003 A265164
KEYWORD
nonn,more
AUTHOR
Jean-Luc Baril, Nov 24 2008
STATUS
approved