This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A320573 #11 Oct 22 2018 01:38:47 %S A320573 1,2,6,8,8,24,48,32,32,16,48,24,144,72 %N A320573 a(n) gives the number of configurations of non-attacking rooks on an n X n chessboard such that the number of distinct distances between the rooks is given by A320448(n). %e A320573 For n = 6 the a(6) = 24 solutions are the eight symmetries of %e A320573 +---+---+---+---+---+---+ %e A320573 | * | | | | | | %e A320573 +---+---+---+---+---+---+ %e A320573 | | | * | | | | %e A320573 +---+---+---+---+---+---+ %e A320573 | | * | | | | | %e A320573 +---+---+---+---+---+---+, %e A320573 | | | | | * | | %e A320573 +---+---+---+---+---+---+ %e A320573 | | | | | | * | %e A320573 +---+---+---+---+---+---+ %e A320573 | | | | * | | | %e A320573 +---+---+---+---+---+---+ %e A320573 +---+---+---+---+---+---+ %e A320573 | * | | | | | | %e A320573 +---+---+---+---+---+---+ %e A320573 | | | * | | | | %e A320573 +---+---+---+---+---+---+ %e A320573 | | | | | | * | %e A320573 +---+---+---+---+---+---+, and %e A320573 | | | | * | | | %e A320573 +---+---+---+---+---+---+ %e A320573 | | | | | * | | %e A320573 +---+---+---+---+---+---+ %e A320573 | | * | | | | | %e A320573 +---+---+---+---+---+---+ %e A320573 +---+---+---+---+---+---+ %e A320573 | * | | | | | | %e A320573 +---+---+---+---+---+---+ %e A320573 | | * | | | | | %e A320573 +---+---+---+---+---+---+ %e A320573 | | | | | * | | %e A320573 +---+---+---+---+---+---+. %e A320573 | | | | * | | | %e A320573 +---+---+---+---+---+---+ %e A320573 | | | | | | * | %e A320573 +---+---+---+---+---+---+ %e A320573 | | | * | | | | %e A320573 +---+---+---+---+---+---+ %Y A320573 Cf. A319476, A320575, A320576, A320448, A320573, A320574. %K A320573 nonn,more %O A320573 1,2 %A A320573 _Peter Kagey_, Oct 15 2018 %E A320573 a(11)-a(14) from _Giovanni Resta_, Oct 21 2018