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A109413
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a(n) equals the (n*(n+1)/2)-th partial sum of the self-convolution of A010054, which has the g.f.: Sum_{n>=0} x^(n*(n+1)/2).
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2
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1, 3, 6, 11, 17, 24, 35, 45, 58, 71, 87, 106, 123, 144, 164, 189, 216, 240, 269, 298, 329, 365, 396, 437, 471, 510, 551, 591, 642, 683, 730, 778, 827, 882, 932, 987, 1048, 1105, 1165, 1220, 1289, 1355, 1418, 1485, 1549, 1626, 1699, 1772, 1846, 1923, 2002, 2080
(list; graph; refs; listen; history; internal format)
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