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A366657
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Sum of the divisors of 8^n+1.
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9
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3, 13, 84, 800, 4356, 51792, 351120, 3100240, 17041416, 211053040, 1494039792, 12611914848, 73234343952, 794382536272, 5936210280000, 60037292774400, 282937726148616, 3264911394064320, 24128875076496960, 208532141890460960, 1225825603154905104
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OFFSET
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0,1
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LINKS
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FORMULA
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EXAMPLE
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a(4)=4356 because 8^4+1 has divisors {1, 17, 241, 4097}.
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MAPLE
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a:=n->numtheory[sigma](8^n+1):
seq(a(n), n=0..100);
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MATHEMATICA
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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