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A163675
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a(n)=n*(2*n^2+5*n+19)/2
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0
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0, 13, 37, 78, 142, 235, 363, 532, 748, 1017, 1345, 1738, 2202, 2743, 3367, 4080, 4888, 5797, 6813, 7942, 9190, 10563, 12067, 13708, 15492, 17425, 19513, 21762, 24178, 26767, 29535, 32488, 35632, 38973, 42517, 46270, 50238, 54427, 58843, 63492, 68380
(list; graph; refs; listen; history; internal format)
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