A054148 T(2n+1,n), array T as in A054144.
1, 5, 28, 132, 574, 2380, 9560, 37536, 144872, 551696, 2078464, 7761600, 28771168, 105985984, 388336256, 1416262656, 5144067200, 18616720640, 67159278592, 241579840512, 866744413696, 3102440074240, 11081272653824
Offset: 0