References to A073913

Number of staircase polygons on the square lattice with perimeter 2n and one (possibly rotated) staircase polygonal hole.
1, 12, 94, 604, 3461, 18412, 93016, 452500, 2139230, 9890404, 44921002

2 seqfan posts

Sat Feb 14 17:55:18 CET 2009    [seqfan] Re: Staircase Polygons (with a Rotate...), a correction
Sat Feb 14 17:48:59 CET 2009    [seqfan] Re: Staircase Polygons (with a Rotated Staircase hole) by perimeter

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