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A085333
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a(n) is the least n-th power of a prime that are sum of two positive cubes, or 0 if no solution exists (for n=3k).
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1
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2, 9, 0, 16, 243, 0, 128, 6561, 0, 1024, 177147, 0, 8192, 4782969, 0, 65536, 129140163, 0, 524288, 3486784401, 0, 4194304, 94143178827, 0, 33554432, 2541865828329, 0, 268435456, 68630377364883, 0, 2147483648, 1853020188851841, 0
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,1
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FORMULA
| a(n) is the least solution to p^n=x^3+y^3, x, y>0 or a(n)=a(3k)=0 labels cases if no solution exists.
a(3k)=0, a(3k+1)=2^(3k+1), a(3k+2)=3^(3k+2).
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CROSSREFS
| Cf. A085332.
Sequence in context: A188619 A020817 A133768 * A128892 A187556 A198103
Adjacent sequences: A085330 A085331 A085332 * A085334 A085335 A085336
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KEYWORD
| nonn
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AUTHOR
| Labos E. (labos(AT)ana.sote.hu), Jul 07 2003
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EXTENSIONS
| Formula, corrected description and more terms from Ray Chandler (rayjchandler(AT)sbcglobal.net), Jul 20 2003
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