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A351950
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Arithmetic derivative of the factorial base exp-function: a(n) = A003415(A276076(n)).
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6
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0, 1, 1, 5, 6, 21, 1, 7, 8, 31, 39, 123, 10, 45, 55, 185, 240, 705, 75, 275, 350, 1075, 1425, 3975, 1, 9, 10, 41, 51, 165, 12, 59, 71, 247, 318, 951, 95, 365, 460, 1445, 1905, 5385, 650, 2175, 2825, 8275, 11100, 30075, 14, 77, 91, 329, 420, 1281, 119, 483, 602, 1939, 2541, 7287, 840, 2905, 3745, 11165, 14910, 40845
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OFFSET
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0,4
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LINKS
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FORMULA
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PROG
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(PARI)
A003415(n) = if(n<=1, 0, my(f=factor(n)); n*sum(i=1, #f~, f[i, 2]/f[i, 1]));
A276076(n) = { my(i=0, m=1, f=1, nextf); while((n>0), i=i+1; nextf = (i+1)*f; if((n%nextf), m*=(prime(i)^((n%nextf)/f)); n-=(n%nextf)); f=nextf); m; };
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CROSSREFS
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Differs from a similarly defined A327860 for the first time at n=24.
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KEYWORD
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nonn,base
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AUTHOR
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STATUS
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approved
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