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A194779
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Number of lower triangles of a (2n-1)X(2n-1) 0..n array with new values introduced in row major order 0..n and no element unequal to more than one horizontal or vertical neighbor
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0
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1, 7, 43, 268, 1740, 11862, 85013, 639760, 5045610, 41615165, 358185399, 3210667490, 29914284833, 289187621900, 2895861006415
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OFFSET
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1,2
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COMMENTS
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LINKS
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EXAMPLE
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All solutions for n=2 containing a 2
..0
..1.1
..1.1.2
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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