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A059279
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G.f. is ((1-x)/(1-2*x)) * G(x*(1-x)/(1-2*x)) where G(x) is g.f. for Catalan numbers A000108.
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1
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1, 2, 6, 20, 72, 276, 1112, 4656, 20080, 88608, 398144, 1815248, 8375904, 39037120, 183493440, 868853120, 4140414720, 19841656960, 95559048960, 462268075520, 2245165391360, 10943794652160, 53519094753280, 262510076263680, 1291131867203072
(list; graph; refs; listen; history; internal format)
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