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A091934
Number of dual isomorphisms on [ n,n* ].
1
1, 3, 4, 7, 8, 10, 11, 15, 19, 24, 25, 30
OFFSET
1,2
COMMENTS
I would like a better definition. - N. J. A. Sloane.
LINKS
CROSSREFS
Cf. A220096.
Sequence in context: A184835 A184823 A242921 * A178482 A284658 A286340
KEYWORD
nonn,more,uned,obsc
AUTHOR
Jon Perry, Mar 11 2004
STATUS
approved