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A106034
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a(n) is the least number such that n*prime(n)+a(n) is a perfect cube.
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0
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6, 2, 12, 36, 9, 47, 6, 64, 9, 53, 2, 68, 196, 127, 24, 152, 328, 233, 58, 308, 195, 459, 288, 61, 319, 118, 594, 379, 214, 706, 159, 721, 392, 187, 617, 396, 23, 665, 346, 1080, 661, 398, 1048, 769, 396, 107, 731, 1463, 1044, 717, 284, 1396, 1051, 270, 1490, 897
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,1
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EXAMPLE
| a(10)=53 because 10*prime(10)+a(10)=10*29+53=343=7^3
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MATHEMATICA
| f[n_] := (Ceiling[(n*Prime[n])^(1/3)])^3 - n*Prime[n]; Table[f[n], {n, 100}]
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CROSSREFS
| Sequence in context: A050088 A163864 A112591 * A194036 A194100 A142867
Adjacent sequences: A106031 A106032 A106033 * A106035 A106036 A106037
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KEYWORD
| nonn
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AUTHOR
| Zak Seidov (zakseidov(AT)yahoo.com), May 05 2005
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EXTENSIONS
| Extended by Ray Chandler (rayjchandler(AT)sbcglobal.net), May 07 2005
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