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A215704
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n-th derivative of ((x^x)^x)^x at x=1.
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5
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1, 1, 6, 27, 156, 1110, 8322, 70098, 646272, 6333336, 66712680, 745731360, 8780828328, 108873486072, 1413807287760, 19157627737080, 270460073295360, 3965693824244160, 60266513065134528, 947644484349584448, 15389579447794454400, 257702782790624613120
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OFFSET
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0,3
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COMMENTS
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Also n-th derivative of x^(x^3) at x=1.
First term < 0: a(57).
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LINKS
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FORMULA
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E.g.f.: (x+1)^((x+1)^3).
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MAPLE
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a:= n-> n!*coeff(series(subs(x=x+1, ((x^x)^x)^x ), x, n+1), x, n):
seq(a(n), n=0..25);
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CROSSREFS
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KEYWORD
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sign
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AUTHOR
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STATUS
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approved
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