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A132296
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Sum of the noncube numbers less than or equal to n.
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2
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0, 2, 5, 9, 14, 20, 27, 27, 36, 46, 57, 69, 82, 96, 111, 127, 144, 162, 181, 201, 222, 244, 267, 291, 316, 342, 342, 370, 399, 429, 460, 492, 525, 559, 594, 630, 667, 705, 744, 784, 825, 867, 910, 954, 999, 1045, 1092, 1140, 1189, 1239, 1290, 1342, 1395, 1449
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OFFSET
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1,2
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LINKS
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FORMULA
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EXAMPLE
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Let n=10. The sum of the noncube numbers <= 10 is 2+3+4+5+6+7+9+10 = 46, the 10th entry in the sequence.
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MATHEMATICA
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Accumulate[Table[If[IntegerQ[n^(1/3)], 0, n], {n, 60}]] (* Harvey P. Dale, Oct 16 2012 *)
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PROG
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(PARI) g(n)=for(x=1, n, r=floor(x^(1/3)); sumcu=(r*(r+1)/2)^2; sn=x*(x+1)/2; print1(sn-sumcu", "))
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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