This site is supported by donations to The OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A320576 a(n) gives the number of configurations of non-attacking rooks up to symmetry on an n X n chessboard such that the number of distinct distances between the rooks is given by A319476(n). 6
 1, 1, 2, 1, 1, 10, 1, 1, 1, 1, 1, 1, 1, 1 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,3 LINKS Giovanni Resta, Illustration of a(3)-a(14) EXAMPLE For n = 7 the a(7) = 1 board with A319476(7) = 5 distinct distances is   +---+---+---+---+---+---+---+ 7 |   |   | * |   |   |   |   |   +---+---+---+---+---+---+---+ 6 |   |   |   |   |   | * |   |   +---+---+---+---+---+---+---+ 5 | * |   |   |   |   |   |   |   +---+---+---+---+---+---+---+ 4 |   |   |   | * |   |   |   |   +---+---+---+---+---+---+---+. 3 |   |   |   |   |   |   | * |   +---+---+---+---+---+---+---+ 2 |   | * |   |   |   |   |   |   +---+---+---+---+---+---+---+ 1 |   |   |   |   | * |   |   |   +---+---+---+---+---+---+---+     A   B   C   D   E   F   G CROSSREFS Cf. A319476, A320575, A320576, A320448, A320573, A320574. Sequence in context: A256168 A054768 A104251 * A153731 A262226 A298158 Adjacent sequences:  A320573 A320574 A320575 * A320577 A320578 A320579 KEYWORD nonn,more AUTHOR Peter Kagey, Oct 15 2018 EXTENSIONS a(10)-a(14) from Giovanni Resta, Oct 21 2018 STATUS approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified July 19 08:23 EDT 2019. Contains 325155 sequences. (Running on oeis4.)