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A098841
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Number of disconnected (decomposable) configurations of type (n_3).
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3
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 4, 13, 47
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OFFSET
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1,16
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LINKS
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Table of n, a(n) for n=1..18.
A. Betten, G. Brinkmann and T. Pisanski, Counting symmetric configurations v_3, Discrete Appl. Math., 99 (2000), 331-338.
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CROSSREFS
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Cf. A001403, A023994.
Sequence in context: A014145 A354550 A143566 * A017944 A017945 A055451
Adjacent sequences: A098838 A098839 A098840 * A098842 A098843 A098844
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KEYWORD
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nonn,hard,more
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AUTHOR
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N. J. A. Sloane, Nov 05 2004
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STATUS
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approved
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