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A124481 Number of connected hook length posets, with n elements. 4
1, 1, 2, 5, 11, 31, 75, 232, 607 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

LINKS

Table of n, a(n) for n=1..9.

Cheryl A. Gann and Robert A. Proctor, Poset Counts

Robert A. Proctor, Definition of hook length poset

CROSSREFS

Cf. A000112, A124480, A124482, A124483.

Sequence in context: A079225 A139466 A139467 * A002862 A190865 A139464

Adjacent sequences:  A124478 A124479 A124480 * A124482 A124483 A124484

KEYWORD

more,nonn

AUTHOR

Franklin T. Adams-Watters, Nov 03 2006

STATUS

approved

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Last modified June 18 19:42 EDT 2013. Contains 226356 sequences.