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 A321532 a(n) gives the number of configurations of non-attacking rooks on an n X n chessboard such that the number of distinct directions between the rooks is given by A321531(n). 1
 1, 2, 4, 8, 16, 168, 88, 592, 712 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 LINKS EXAMPLE For n = 5, the a(5) = 16 configurations of nonattacking rooks with the maximal number of directions between them are given by the following two chessboards under all eight symmetries of the square.    +---+---+---+---+---+   5| X |   |   |   |   |    +---+---+---+---+---+   4|   |   | X |   |   |    +---+---+---+---+---+   3|   |   |   | X |   |    +---+---+---+---+---+   2|   |   |   |   | X |    +---+---+---+---+---+   1|   | X |   |   |   |    +---+---+---+---+---+      A   B   C   D   E    +---+---+---+---+---+   5| X |   |   |   |   |    +---+---+---+---+---+   4|   |   |   | X |   |    +---+---+---+---+---+   3|   |   | X |   |   |    +---+---+---+---+---+   2|   |   |   |   | X |    +---+---+---+---+---+   1|   | X |   |   |   |    +---+---+---+---+---+      A   B   C   D   E CROSSREFS Cf. A321531. Sequence in context: A277280 A095197 A333302 * A061581 A046251 A281291 Adjacent sequences:  A321529 A321530 A321531 * A321533 A321534 A321535 KEYWORD nonn,more AUTHOR Peter Kagey, Nov 12 2018 STATUS approved

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Last modified August 13 18:03 EDT 2022. Contains 356107 sequences. (Running on oeis4.)