A391631 Number of mutual-visibility sets in the n X n rook complement graph.

2, 7, 334, 58875, 33405756, 68716991862, 562949918300022, 18446744073262895647, 2417851639229253060330052

Offset

1,1

Links

Table of n, a(n) for n=1..9.

Eric Weisstein's World of Mathematics, Rook Complement Graph.

Eric Weisstein's World of Mathematics, Visibility Polynomial.

Crossrefs

Sequence in context: A137666 A137665 A128466 * A048122 A144787 A118910

Adjacent sequences: A391628 A391629 A391630 * A391632 A391633 A391634

Keyword

nonn,more

Author

Eric W. Weisstein, Dec 14 2025

Extensions

a(6)-a(9) from Andrew Howroyd, Jan 19 2026

Status

approved