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 A078819 140*C(2n,n)/(n+4). 3
 35, 56, 140, 400, 1225, 3920, 12936, 43680, 150150, 523600, 1847560, 6584032, 23661365, 85652000, 312018000, 1142971200, 4207562730, 15557374800, 57750861000, 215145084000, 804104751450, 3014244096864, 11329763650800 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,1 LINKS FORMULA a(n) =a(n-1)*(4n^2+10n-6)/(n^2+4n) =A078817(n, 3) =7*A078820(n)/(2n+1) =140*A000984(n)/(n+4). EXAMPLE a(5)=140*C(10,5)/9=3920 CROSSREFS Cf. A000108, A038629, A078818. Sequence in context: A176255 A090877 A048033 * A189554 A219806 A095958 Adjacent sequences:  A078816 A078817 A078818 * A078820 A078821 A078822 KEYWORD nonn AUTHOR Henry Bottomley, Dec 07 2002 STATUS approved

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