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A027790
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10*(n+1)*C(n+3,5)/3.
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0
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10, 80, 350, 1120, 2940, 6720, 13860, 26400, 47190, 80080, 130130, 203840, 309400, 456960, 658920, 930240, 1288770, 1755600, 2355430, 3116960, 4073300, 5262400, 6727500, 8517600, 10687950, 13300560, 16424730, 20137600
(list; graph; refs; listen; history; internal format)
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