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A290714 Number of irredundant sets in the n X n bishop graph. 6
2, 9, 110, 2116, 59670, 2509056, 147357840, 12001640704, 1321710590682, 196996776086916 (list; graph; refs; listen; history; text; internal format)
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: A309452 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

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Last modified October 23 08:40 EDT 2021. Contains 348211 sequences. (Running on oeis4.)