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A030277
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Shifts left 2 places under COMPOSE transform.
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4
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1, 1, 1, 2, 4, 10, 28, 86, 286, 1019, 3857, 15418, 64782, 285041, 1309355, 6263085, 31127475, 160432093, 856039863, 4721638083, 26883787141, 157812750656, 953995201996, 5932516347277, 37913110456751, 248768719522450, 1674488577654500, 11553041105489900
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listen;
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OFFSET
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1,4
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LINKS
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FORMULA
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G.f. A(x) satisfies: A(x) = x + x^2 * (1 + A(A(x))). - Ilya Gutkovskiy, May 10 2019
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MATHEMATICA
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CROSSREFS
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KEYWORD
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nonn,eigen
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AUTHOR
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STATUS
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approved
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