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A053368
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a(n)=(5n+2)*C(n) where C(n)=Catalan numbers (A000108).
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0
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2, 7, 24, 85, 308, 1134, 4224, 15873, 60060, 228514, 873392, 3350802, 12896744, 49774300, 192559680, 746503065, 2899328940, 11279096730, 43942760400, 171424529430, 669540282840
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