References to A146069

Number of n X n binary arrays symmetric under 90 degree rotation with all ones connected only in a 5-point zee 1,1 2,1 2,2 2,3 3,3 in any orientation.
1, 1, 1, 1, 1, 1, 9, 21, 35, 101, 287, 859, 3329, 15189, 75035, 399377, 2204921


1 seqfan posts

Fri May 21 09:59:46 CEST 2010    [seqfan] Re: Missing word in A107978

Index of A-numbers in seqfan: by ascending order    by month    by frequency    by keyword
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