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A005426 Number of linear geometries on n points with <=3 points per line.
(Formerly M0292)
0

%I M0292

%S 1,1,1,2,2,3,5,11,32,163,1680

%N Number of linear geometries on n points with <=3 points per line.

%D N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).

%H D. G. Glynn, <a href="https://doi.org/10.1016/0097-3165(88)90027-1">Rings of geometries II</a>, J. Combin. Theory, A 49 (1988), 26-66.

%K nonn,hard,nice

%O 0,4

%A _N. J. A. Sloane_, _Simon Plouffe_

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Last modified July 28 11:50 EDT 2021. Contains 346328 sequences. (Running on oeis4.)