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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
OFFSET
1,1
LINKS
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
KEYWORD
nonn,more
AUTHOR
Eric W. Weisstein, Aug 09 2017
EXTENSIONS
a(5)-a(10) from Andrew Howroyd, Aug 19 2017
STATUS
approved