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A098841 Number of disconnected (decomposable) configurations of type (n_3). 3
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 4, 13, 47 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,16
LINKS
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.
CROSSREFS
Cf. A001403, A023994.
Sequence in context: A014145 A354550 A143566 * A363547 A017944 A017945
Adjacent sequences: A098838 A098839 A098840 * A098842 A098843 A098844
KEYWORD
nonn,hard,more
AUTHOR
N. J. A. Sloane, Nov 05 2004
STATUS
approved

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Last modified June 1 02:06 EDT 2024. Contains 373008 sequences. (Running on oeis4.)