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A081197
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Diagonal sums of A081130.
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0
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1, 1, 4, 13, 44, 162, 643, 2724, 12259, 58423, 293902, 1555743, 8640526, 50222288, 304792741, 1927313470, 12673784445, 86517541197, 612134881624, 4482215342305, 33919417267456, 264951302794510, 2133720505175351
(list; graph; refs; listen; history; internal format)
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