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Search: id:A134630
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| A134630 |
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5*n^5 - 3*n^3 - 2*n^2. Coefficients and exponents are the prime numbers in decreasing order. |
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+0
1
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| 0, 0, 128, 1116, 4896, 15200, 38160, 82908, 162176, 292896, 496800, 801020, 1238688, 1849536, 2680496, 3786300, 5230080, 7083968, 9429696
(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) = 5*n^5 - 3*n^3 - 2*n^2.
G.f.: 4*x^2*(32+87*x+30*x^2+x^3)/(-1+x)^6. - R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Nov 14 2007
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EXAMPLE
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a(4)=4896 because 4^5=1024, 5*1024=5120, 4^3=64, 3*64=192, 4^2=16, 2*16=32 and we can write 5120-192-32=4896.
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CROSSREFS
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Cf. A000290, A000578, A000584, A045991, A100019, A133070.
Adjacent sequences: A134627 A134628 A134629 this_sequence A134631 A134632 A134633
Sequence in context: A123293 A130813 A100628 this_sequence A133061 A070055 A093528
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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 04 2007
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