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A116869
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Sixth column of triangle A028364.
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1
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132, 297, 869, 2739, 8986, 30275, 104006, 362738, 1280592, 4566642, 16423581, 59497075, 216901454, 795117015, 2929034130, 10837075830, 40253156520, 150045410430, 561097823490, 2104382963214, 7913603390196
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OFFSET
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0,1
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COMMENTS
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Also sixth diagonal of triangle A067323.
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LINKS
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FORMULA
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a(n)= A028364(n+5,5) = sum(C(k)*C(n+5-k),k=0..5), with the Catalan numbers C(n):=A000108(n).
G.f.: (c5(x)*c(x)-(c5(x)-1)/x)/x^5, with c5(x) := sum(C(k)*x^k, k=0..5) and c(x) is the g.f. for the Catalan numbers A000108.
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CROSSREFS
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KEYWORD
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nonn,easy
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AUTHOR
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STATUS
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approved
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