A290714 Number of irredundant sets in the n X n bishop graph.

2, 9, 110, 2116, 59670, 2509056, 147357840, 12001640704, 1321710590682, 196996776086916

Offset

1,1

Links

Table of n, a(n) for n=1..10.

Eric Weisstein's World of Mathematics, Bishop Graph

Eric Weisstein's World of Mathematics, Irredundant Set

Formula

a(n) = A290712(n) * A290713(n) for n > 1. - Andrew Howroyd, Aug 10 2017

Crossrefs

Cf. A290712, A290713, A291060.

Sequence in context: A354663 A219116 A245731 * A062498 A339015 A305005

Adjacent sequences: A290711 A290712 A290713 * A290715 A290716 A290717

Keyword

nonn,more

Author

Eric W. Weisstein, Aug 09 2017

Extensions

a(5)-a(10) from Andrew Howroyd, Aug 19 2017

Status

approved