OFFSET
0,2
LINKS
Andrew Howroyd, Table of n, a(n) for n = 0..50
EXAMPLE
The a(1) = 10 matchings consist of the empty matching, 6 matchings with a single edge and 3 perfect matchings.
CROSSREFS
KEYWORD
nonn
AUTHOR
Andrew Howroyd, Feb 21 2021
STATUS
approved