References to A006192

Number of nonintersecting (or self-avoiding) rook paths joining opposite corners of 3 X n board.
1, 4, 12, 38, 125, 414, 1369, 4522, 14934, 49322, 162899, 538020, 1776961

2 seqfan posts

Sat Oct 30 04:37:04 CEST 2010    [seqfan] Re: Rook path generates A006189 Number of paths on square lattice?
Tue Sep 14 10:12:57 CEST 2010    [seqfan] non-intersecting rook paths from corner to corner
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