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A086621
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Main diagonal of square table A086620 of coefficients, T(n,k), of x^n*y^k in f(x,y) that satisfies f(x,y) = 1/(1-x-y) + xy*f(x,y)^2.
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2
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1, 3, 14, 79, 504, 3514, 26172, 204831, 1664696, 13930840, 119312544, 1041227642, 9228614836, 82867255956, 752405060536, 6897376441167, 63760133568096, 593763928313128
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