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A000663
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Relations on an infinite set.
(Formerly M1932 N0763)
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0
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1, 2, 9, 37, 183, 933, 5314, 32043, 207212, 1415934, 10200289, 77018442, 607474564, 4987909231, 42519634303, 375395726926
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,2
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REFERENCES
| W. Oberschelp, Kombinatorische Anzahlbestimmungen in Relationen, Math. Ann., 174 (1967), 53-78.
N. J. A. Sloane, A Handbook of Integer Sequences, Academic Press, 1973 (includes this sequence).
N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
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CROSSREFS
| Sequence in context: A150991 A150992 A151310 * A122673 A139102 A195187
Adjacent sequences: A000660 A000661 A000662 * A000664 A000665 A000666
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KEYWORD
| nonn,nice,more
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AUTHOR
| N. J. A. Sloane (njas(AT)research.att.com).
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EXTENSIONS
| More terms from Vladeta Jovovic (vladeta(AT)eunet.rs), Jan 10 2000
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