A291947 Number of matchings in the n-polygon diagonal intersection graph.

4, 19, 708, 434084, 2241083208326, 215756808230894177, 2060566480104934403920300234585909787665, 617615253014819903932289163457572353933923701758144

Offset

3,1

Comments

Term a(11) has 99 decimal digits. - Andrew Howroyd, Mar 12 2018

Links

Andrew Howroyd, Table of n, a(n) for n = 3..11

Eric Weisstein's World of Mathematics, Independent Edge Set

Eric Weisstein's World of Mathematics, Matching

Eric Weisstein's World of Mathematics, Polygon Diagonal Intersection Graph

Crossrefs

Cf. A291950, A292921, A300530, A300531.

Sequence in context: A080991 A000844 A000863 * A023994 A002813 A263973

Adjacent sequences: A291944 A291945 A291946 * A291948 A291949 A291950

Keyword

nonn

Author

Eric W. Weisstein, Mar 09 2018

Extensions

a(8)-a(10) from Andrew Howroyd, Mar 11 2018

Status

approved