A341503 Number of matchings in the 4 X n rook graph.
1, 10, 193, 5950, 270529, 16873930, 1384880065, 144218696590, 18583827550465, 2898418007316970, 538034003700151105, 117117180185558050750, 29538673951318735414465, 8540274169019607609510250, 2805241403079208727201012545, 1038436904586470317663800172750
Offset: 0
Keywords
Examples
The a(1) = 10 matchings consist of the empty matching, 6 matchings with a single edge and 3 perfect matchings.
Links
- Andrew Howroyd, Table of n, a(n) for n = 0..50
Crossrefs
Row 4 of A270227.