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 A194191 Number of ways to arrange 6 indistinguishable points on an n X n square grid so that no three points are collinear at any angle. 3
 0, 0, 2, 998, 36698, 620210, 5367308, 34678364, 169259212, 682686652, 2356999994, 7294368210, 20227526910, 52008171998, 124422857864, 279767468172, 596674510744, 1218556387684, 2385034544810, 4509309201242 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,3 COMMENTS Column 6 of A194193. LINKS Table of n, a(n) for n=1..20. EXAMPLE Some solutions for 4 X 4: ..1..0..1..0....0..1..1..0....1..0..0..1....0..1..0..0....0..1..0..1 ..0..0..0..1....1..0..0..0....0..0..1..1....0..0..1..1....0..0..0..1 ..0..1..0..0....0..1..1..0....0..0..0..0....0..0..1..0....0..0..1..0 ..0..0..1..1....1..0..0..0....0..1..1..0....1..0..0..1....1..0..1..0 CROSSREFS Sequence in context: A337309 A172386 A079233 * A190579 A271527 A214543 Adjacent sequences: A194188 A194189 A194190 * A194192 A194193 A194194 KEYWORD nonn AUTHOR R. H. Hardin, Aug 18 2011 STATUS approved

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Last modified June 17 03:50 EDT 2024. Contains 373432 sequences. (Running on oeis4.)