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A158527
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Sum of squares of consecutive positive noncubes.
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1
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139, 5997, 78414, 553810, 2677065, 10009839, 31098172, 84004164, 203427495, 451263505, 931565514, 1811000022, 3346004389, 5917977555, 10077955320, 16602342664, 26561396547, 41402273589, 63048577990, 94018466010
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OFFSET
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1,1
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LINKS
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FORMULA
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a(n)=(1/2)*n*(1 + n)*(1 + 9*n + 27*n^2 + 42*n^3 + 36*n^4 + 18*n^5 + 6*n^6)
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EXAMPLE
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a(1)=139=2^2+...+7^2, a(2)=9^2+...+26^2.
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CROSSREFS
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Cf. A048396 Sum of consecutive noncubes.
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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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