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 A209585 Number of n X n 0..n arrays with every element equal to a diagonal or antidiagonal reflection 1
 2, 81, 28672, 791015625, 191221621088256, 7860041410116536427241, 2836619246897071128576000000000, 304913968803300753908857213381006097576481 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Diagonal of A209593 LINKS R. H. Hardin, Table of n, a(n) for n = 1..10 FORMULA a(n) = (n+1) ^ (2n-(n modulo 2)) * ((n+1)*(2n+1)) ^ ((n*n-2n+(n modulo 2))/4) EXAMPLE Some solutions for n=3 ..0..0..1....3..0..2....2..0..1....0..3..0....2..0..0....3..3..3....0..2..2 ..0..1..1....1..0..0....0..1..3....2..3..3....2..3..0....2..1..3....2..1..2 ..3..1..2....0..1..1....1..3..3....3..2..2....2..2..3....0..2..0....0..2..3 CROSSREFS Sequence in context: A318587 A302722 A123177 * A090603 A020955 A230398 Adjacent sequences:  A209582 A209583 A209584 * A209586 A209587 A209588 KEYWORD nonn AUTHOR R. H. Hardin Mar 10 2012 STATUS approved

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Last modified July 27 17:57 EDT 2021. Contains 346308 sequences. (Running on oeis4.)