A152093 - OEIS

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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

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OFFSET

1,2

LINKS

Table of n, a(n) for n=1..10.

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

Adjacent sequences: A152090 A152091 A152092 * A152094 A152095 A152096

KEYWORD

nonn,more

AUTHOR

Jean-Luc Baril, Nov 24 2008

STATUS

approved