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Search: id:A133071
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| A133071 |
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n^5-n^3+n^2. Exponents are the prime numbers in decreasing order. |
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+0
3
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| 0, 1, 28, 225, 976, 3025, 7596, 16513, 32320, 58401, 99100, 159841, 247248, 369265, 535276, 756225, 1044736, 1415233, 1884060, 2469601, 3192400, 4075281, 5143468, 6424705, 7949376, 9750625
(list; graph; listen)
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OFFSET
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0,3
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FORMULA
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a(n) = n^5-n^3+n^2
G.f.: x*(72x^2-x^4+22x+1+26x^3)/(x-1)^6. - R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Nov 14 2007
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EXAMPLE
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a(7)=16513 because 7^5=16807, 7^3=343, 7^2=49 and we can write 16807-343+49=16513.
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CROSSREFS
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Cf. A000290, A000578, A000584, A011379, A045991, A100019.
Sequence in context: A135826 A042526 A053135 this_sequence A135180 A042524 A125365
Adjacent sequences: A133068 A133069 A133070 this_sequence A133072 A133073 A133074
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KEYWORD
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nonn
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AUTHOR
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Omar E. Pol (info(AT)polprimos.com), Nov 01 2007
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