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A162078
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Number of nXn symmetric 0..2 arrays with rows, considered as 3-ary numbers, in nondecreasing order
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1
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3, 15, 151, 3495, 198503, 28534087, 10586251623, 10294697200775, 26586793509930791, 184408340876752843335, 3468543642532070124804583, 178388170025664039139771509767, 25266393167195209778186849218689703
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