1,16
A. Betten, G. Brinkmann and T. Pisanski, Counting symmetric configurations v_3, Discrete Appl. Math., 99 (2000), 331-338.
Cf. A001403, A023994.
Sequence in context: A026641 A087440 A014145 this_sequence A017944 A017945 A055451
Adjacent sequences: A098838 A098839 A098840 this_sequence A098842 A098843 A098844
nonn,hard
njas, Nov 05 2004
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