

A330658


Number of ways to place zero or more dominoes on an n X n grid with an equal number of horizontal and vertical dominoes.


1



1, 1, 1, 23, 1608, 371500, 328956227, 1126022690953, 14806761014366079, 744494518032208898560, 142687918961909575461700797, 103997384424546478979311463191760, 287748628673335369235353717267441839979, 3018422667417995172483450578913829739500058615
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