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 A069052 a(n) = denominator of sum_{i=1..n} 1/i^5. 7
 1, 32, 7776, 248832, 777600000, 259200000, 4356374400000, 139403980800000, 101625502003200000, 101625502003200000, 16366888723117363200000, 16366888723117363200000, 6076911214672415134617600000 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 LINKS FORMULA If 1<=n<=19, a(n) = A007480(n)*A002805(n) = denominator(sum_{i=1..n} 1/i^4)*denominator(sum_{i=1..n} 1/i). MATHEMATICA s=0; lst={}; Do[s+=1/n^5; AppendTo[lst, Denominator[s]], {n, 3*4!}]; lst (* Vladimir Joseph Stephan Orlovsky, Jan 24 2009 *) CROSSREFS Numerators are A099828. Sequence in context: A224107 A016829 A248720 * A221614 A086752 A248001 Adjacent sequences:  A069049 A069050 A069051 * A069053 A069054 A069055 KEYWORD easy,frac,nonn AUTHOR Benoit Cloitre, Apr 03 2002 STATUS approved

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Last modified February 26 10:42 EST 2020. Contains 332279 sequences. (Running on oeis4.)