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A091934 Number of dual isomorphisms on [ n,n* ]. 0
1, 3, 4, 7, 8, 10, 11, 15, 19, 24, 25, 30 (list; graph; refs; listen; history; internal format)
OFFSET

1,2

LINKS

Jon Perry, Trees of height 2 (bottom of page)

CROSSREFS

Sequence in context: A005187 A184835 A184823 * A178482 A024515 A187835

Adjacent sequences:  A091931 A091932 A091933 * A091935 A091936 A091937

KEYWORD

nonn,uned,obsc

AUTHOR

Jon Perry (perry(AT)globalnet.co.uk), Mar 11 2004

EXTENSIONS

I would like a better definition. - N. J. A. Sloane (njas(AT)research.att.com).

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Last modified February 14 16:28 EST 2012. Contains 205635 sequences.