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A046033
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a(n) = (n!)^3 - 1.
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1
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0, 7, 215, 13823, 1727999, 373247999, 128024063999, 65548320767999, 47784725839871999, 47784725839871999999, 63601470092869631999999, 109903340320478724095999999, 241457638684091756838911999999
(list;
graph;
refs;
listen;
history;
text;
internal format)
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OFFSET
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1,2
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LINKS
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Eric Weisstein's World of Mathematics, Factorial
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FORMULA
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a(n+1)+1 = (a(n)+1)*(n+1)^3.
-(n^2+5*n+7)*(n+1)^4*a(n)+(n^2+3*n+1)*(n^4+6*n^3+14*n^2+15*n+7)*a(n+1)-n*(n^2+3*n+3)*a(n+2) = 0. (End)
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MAPLE
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MATHEMATICA
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PROG
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CROSSREFS
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KEYWORD
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nonn,easy
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AUTHOR
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STATUS
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approved
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