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A139175
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a(n) = (n! - 5)/5.
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10
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23, 143, 1007, 8063, 72575, 725759, 7983359, 95800319, 1245404159, 17435658239, 261534873599, 4184557977599, 71137485619199, 1280474741145599, 24329020081766399, 486580401635327999
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OFFSET
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5,1
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COMMENTS
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Original name: Natural numbers of the form (n!-5)/5.
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LINKS
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FORMULA
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E.g.f.: (120 - 60*x^2 - 40*x^3 - 15*x^4 + 19*x^5)/(120*(1-x)) - exp(x). - G. C. Greubel, Oct 18 2018
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MATHEMATICA
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Table[(n! - 5)/5, {n, 5, 20}]
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PROG
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(PARI) for(n=5, 25, print1((n! -5)/5, ", ")) \\ G. C. Greubel, Oct 18 2018
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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