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A279454 Number of nonequivalent ways to place k>=0 points on an n X n square grid so that no more than 2 points are on a vertical or horizontal straight line. 6

%I #7 Dec 24 2016 09:39:59

%S 2,6,54,1026,38931,2198241,167110761,16248457762,1960813221768

%N Number of nonequivalent ways to place k>=0 points on an n X n square grid so that no more than 2 points are on a vertical or horizontal straight line.

%C Row sum of triangle A279453.

%C Rotations and reflections of a placement are not counted. For numbers if they are to be counted, see A197458.

%Y Cf. A197458, A279453.

%K nonn,more

%O 1,1

%A _Heinrich Ludwig_, Dec 24 2016

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Last modified April 21 06:29 EDT 2024. Contains 371850 sequences. (Running on oeis4.)