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A130491
a(n) = numerator of Sum_{k=1..n} k^mu(n+1-k), where mu(m) = A008683(m).
2
1, 3, 9, 35, 91, 179, 117, 1181, 14113, 1415, 14839, 35617, 85271, 53251, 3503033, 1879, 12165719, 106753, 2870239, 6436711, 46663061, 402271, 850810423, 60658043, 1473361913, 10236631, 21081760033, 39731443, 2762347887557
OFFSET
1,2
COMMENTS
Denominator of Sum_{k=1..n} k^mu(n+1-k) is A130492(n).
MAPLE
A130491 := proc(n) numer(add(k^numtheory[mobius](n+1-k), k=1..n)) ; end: seq(A130491(n), n=1..40) ; # R. J. Mathar, Oct 16 2007
CROSSREFS
KEYWORD
frac,nonn
AUTHOR
Leroy Quet, May 29 2007
EXTENSIONS
More terms from R. J. Mathar, Oct 16 2007
STATUS
approved