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A107863
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Column 1 of triangle A107862; a(n) = C( n*(n+1)/2 + n, n).
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1
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1, 2, 10, 84, 1001, 15504, 296010, 6724520, 177232627, 5317936260, 179013799328, 6681687099710, 273897571557780, 12233149001721760, 591315394579074378, 30756373941461374800, 1712879663609111933495, 101696990867999141755140
(list; graph; refs; listen; history; internal format)
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