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A024850
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Let c(k) denotes the k-th composite number and p(k) the k-th prime number, then a(n) =sum(i=n*(n-1)/2+1,n*(n+1)/2, c(i) ) - sum(i=1,n, prime(i) ).
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1
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2, 9, 21, 46, 84, 135, 136, 205, 308, 429, 583, 772, 987, 1265, 1552, 1906, 2308, 2767, 3278, 3840, 4478, 5201, 5956, 6783, 7704, 8706, 9777, 10976, 12241, 13591, 14985, 16546, 18230, 20019, 21862, 23824, 25907, 28111
(list; graph; refs; listen; history; internal format)
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