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Search: id:A133070
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| A133070 |
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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, 20, 207, 944, 2975, 7524, 16415, 32192, 58239, 98900, 159599, 246960, 368927, 534884, 755775, 1044224, 1414655, 1883412, 2468879, 3191600, 4074399, 5142500, 6423647, 7948224, 9749375
(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*(-1+72*x^2+22*x^3+26*x+x^4)/(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)=16415 because 7^5=16807, 7^3=343, 7^2=49 and we can write 16807-343-49=16415.
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CROSSREFS
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Cf. A000290, A000578, A000584, A011379, A045991, A100019.
Sequence in context: A099197 A041766 A121088 this_sequence A135179 A074668 A139620
Adjacent sequences: A133067 A133068 A133069 this_sequence A133071 A133072 A133073
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KEYWORD
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sign
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AUTHOR
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Omar E. Pol (info(AT)polprimos.com), Nov 01 2007
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