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0, 2, 5, 9, 13, 17, 22, 28, 34, 40, 47, 55, 63, 71, 80, 89, 98, 107, 116, 126, 137, 148, 159, 170, 181, 193, 205, 217, 230, 244, 258, 272, 287, 302, 317, 332, 347, 363, 379, 395, 411, 427, 444, 462, 480, 498, 516, 534, 553, 572, 591, 611, 632
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OFFSET
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1,2
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COMMENTS
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The sum of first n nonprimes is in A051349.
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LINKS
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FORMULA
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a(n) = a(n-1)+A018252(n)-n, a(1) = 0. - from Klaus Brockhaus, Dec 16 2010
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EXAMPLE
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a(1) = 1-1 = 0; a(2) = 0+4-2 = 2, a(3) = 2+6-3 = 5; a(4) = 5+8-4 = 9.
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CROSSREFS
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KEYWORD
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nonn,easy
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AUTHOR
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STATUS
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approved
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